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7.99
Scramble: U F' L B R' B' D' B' R U F2 R L D2 F2 R F2 R' F2 R

Solution:
y z2
D R' F' D L2' // cross
U' R U' R' L U2 L' U2 L U' L' // 1st pair
L' U L y U R U' R' // 2nd pair
y' L' U' L U U R U' R' L' U' L // 3rd pair
U R U' R' y' U R' U R // 4th pair
// last layer skip

(5.139) super lucky.
scramble: R2 D2 R2 B D2 L2 B' D2 B2 L2 R F D2 U B' D' L2 D' L'
Inspection: x2 y
xxCross: D' U L D L' U' L R'
3rd pair: y D R U R' D'
4th pair: y' U2 R U R' U R' F R F'
1LLL: U' R U2 R' U2 R' F R F'
AUF: U'

(5.139) super lucky.
scramble: R2 D2 R2 B D2 L2 B' D2 B2 L2 R F D2 U B' D' L2 D' L'
Inspection: x2 y
xxCross: D' U L D L' U' L R'
3rd pair: y D R U R' D'
4th pair: y' U2 R U R' U R' F R F'
1LLL: U' R U2 R' U2 R' F R F'
AUF: U'

U' F' L B2 R D' L' F2 U' L2 F2 D R2 L2 B2 L2 D2 R2 U2 B' R2

How I solved it?

x2// inspection

F' L' F' L2 D'// Cross
U' R L' U R' L // F2L #1 and #2
U2 y R U R' U' R U R' U' R U R' U' //F2L #3
y R U R' U' R U R' U y' R' U' R U' R' U' R // F2l #4
y F R U R' U' F2' r U R' U' r' F R // OLL
U2 M2' U M U2 M' U M2' // PLL
U2 // AUF

x2// inspection
F' L' F' L2 D'// Cross
U' R L' U R' L // F2L #1 and #2
U2 y R U R' U' R U R' U' R U R' U' //F2L #3
y R U R' U' R U R' U y' R' U' R U' R' U' R // F2l #4
y F R U R' U' F2' r U R' U' r' F R // OLL
U2 M2' U M U2 M' U M2' // PLL
U2 // AUF

Very nice solution for the cross and the first 2 F2L pairs!
The 3rd F2L pair can be solved without a rotation. (yellow top blue front, U2 R' U' R U R' U' R U R' U' R)
The 4th F2L pair can be a lot more efficient. (yellow top green front, U2 R U' R' U' F' U' F)
You could've done an U move instead of a rotation to solve the OLL stage. Btw, try this alg (same angle): r U R' U' r' F R2 U R' U' F'

Overall, very nice solve. I'm very sure that you can improve very quickly from here!

I average sub 18, but I never connect on my lucky solves! I got a PB a few days a go in 12.08 seconds, but I’m sure someone else can do it quicker

Scramble: B' F' D2 R2 B' D2 L2 F D2 F2 D2 U' L2 B' R F2 U' F2 U2 R
Cube: GAN XS
Method: CFOP 4LLL

White Cross
x2 y// Inspection (red front white bottom).
R2 D R’// Cross
U L U’ L’// F2L 1
U2 R’ U2 R L’ U L// F2L 2
U R U2 R’ U’ R’ U2 R y U’ L’ U L// F2L 3
y U2 L’ U L// F2L 4
F R U R’ U’ F’// OLL 1
U R U2 R2 U’ R2 U’ R2 U2// OLL 2
R2 U R’ U’ R’ F R2 U’ R’ U’ R U R’ F U// PLL

60 moves

I just realised how inefficient my F2l is, but ah well, lucky start for me which was nice and fluid.

This is my long standing PB. It was 16.23 and it was the second ever sub 20 solve. I got my first sub 20 just few solves before this one and I was averaging 30+ at the time. It took me another couple of months before i got another sub 19.

Time: 16.23
Scramble: R2 U2 B2 R2 F D2 F U2 B' R2 D2 F2 R' U B' U B2 F U' B
Method: CFOP with 2-look OLL
Cube: Gan 354M
x

//so got a 4 move xcross on blue, yay. so much I could see in inspection
U' R' F2 R

//my lookahead is very bad so the most lucky situation is when both pieces of an F2L pair are right in front of me
U' R U' R' U R U R'

//now I saw the orange-white pair and just solved it
L U L' y U R' U' R

//and it turned out that in the process I set up a last pair for a simple insert with edges oriented of OLL
U R U' R'

Very nice solution for the cross and the first 2 F2L pairs!
The 3rd F2L pair can be solved without a rotation. (yellow top blue front, U2 R' U' R U R' U' R U R' U' R)
The 4th F2L pair can be a lot more efficient. (yellow top green front, U2 R U' R' U' F' U' F)
You could've done an U move instead of a rotation to solve the OLL stage. Btw, try this alg (same angle): r U R' U' r' F R2 U R' U' F'

Overall, very nice solve. I'm very sure that you can improve very quickly from here!

B' L2 B2 R2 F2 U' F2 D F2 L2 F2 U2 R' D R2 U2 F' D' L U B'

How i solved it?

y x' // inspection
D B D R' F R // Cross
R U R' U' y R U' R'// 1st F2L
y2 R U R' y R U R' U2' R U' R'// 2nd F2L
U y' R U2 R' U' L' U L // 3rd F2L
U R U' R' U2 y L' U' L // 4th F2l
R U R' U' M' U R U' r' // OLL
U y R U R' F' R U R' U' R' F R2 U' R' // PLL
U'// AUF

Another similar solve is

y x' // inspection
D B D R' F R // Cross
R U R' U' y R U' R'// 1st F2L
y2 R U R' y R U R' U2' R U' R'// 2nd F2L
U y' R U L' U L U2 R' // 3rd F2L
U2 R U' R' U2 y' R' U2' R U2 R U R' // 4th F2l
U F' r U R' U' r' F R // OLL
U M2' U' M2' U' M' U2 M2' U2 M'// PLL
U // AUF

I used CFOP but with intuitive F2L , and my time was 25.67

B' L2 B2 R2 F2 U' F2 D F2 L2 F2 U2 R' D R2 U2 F' D' L U B'

y x' // inspection
D B D R' F R // Cross
R U R' U' y R U' R'// 1st F2L
y2 R U R' y R U R' U2' R U' R'// 2nd F2L
U y' R U2 R' U' L' U L // 3rd F2L
U R U' R' U2 y L' U' L // 4th F2l
R U R' U' M' U R U' r' // OLL
U y R U R' F' R U R' U' R' F R2 U' R' // PLL
U'// AUF

I know this isn't the place to do solve critiques but:

Cross
There's an easier cross solution:
z
(D U') L F' D
The first D puts the blue opposite green and the U' puts white on top of green so it can be inserted at the same time. This solution is one move shorter and more fingertrick friendly (regripless and the D and U' can be done at the same time so it feels like a 4 move solution)

Spoiler: Discussion about cross

As a side note, when you have a cross solution planned think about the fingertricks and look for a better angle if necessary: on your last PB

you could have done the cross like this:
x2 y'
R' F' R' F2 D'
That's the same thing but from a different angle, and it's regripless if you start with your right thumb on the UFR sticker.
(with experience you'll find more efficient solutions, like F' R' F D')

1st F2L pair
That's a good solution if you don't want to use fancy algs, so the only advice I have here is to take the habit of solving pairs in back slots, even if it means using your left hand:
R U R' U' y' L U' L'

2nd F2L pair
Never do y2 rotations; they're useless as they don't change edge orientation.
You can solve this specific case like this:
U2 L U' L' y' U R U' R'

3rd F2L pair
Same as for the 1st F2L pair, that's a good solution if you don't want to use fancy algs. I'll just say that doing y' U R U2 R' U' L' U L is better than doing U y' R U2 R' U' L' U L since it allows the first part of the alg to be regripless. As a rule of thumb: rotate before starting your alg. Edit: you don't even need to rotate for this case, you can do U L' U L2 U' L', which is just L' U L + L U' L'.

4th F2L pair
Good solution.
Another solution would be: U2 F (R U R' U') F' (U R U' R'). That's a good solution because it's rotationless and it's F (sexy) F' (inverse sexy)

OLL
Nothing to say here

PLL
Don't rotate during PLL, unless there's a rotation in your alg. It's faster to follow this pattern: AUF - alg - AUF than this one: AUF - rotation - alg - AUF

I know this isn't the place to do solve critiques but:

Cross
There's an easier cross solution:
z
(D U') L F' D
The first D puts the blue opposite green and the U' puts white on top of green so it can be inserted at the same time. This solution is one move shorter and more fingertrick friendly (regripless and the D and U' can be done at the same time so it feels like a 4 move solution)

Spoiler: Discussion about cross

As a side note, when you have a cross solution planned think about the fingertricks and look for a better angle if necessary: on your last PB

you could have done the cross like this:
x2 y'
R' F' R' F2 D'
That's the same thing but from a different angle, and it's regripless if you start with your right thumb on the UFR sticker.
(with experience you'll find more efficient solutions, like F' R' F D')

1st F2L pair
That's a good solution if you don't want to use fancy algs, so the only advice I have here is to take the habit of solving pairs in back slots, even if it means using your left hand:
R U R' U' y' L U' L'

2nd F2L pair
Never do y2 rotations; they're useless as they don't change edge orientation.
You can solve this specific case like this:
U2 L U' L' y' U R U' R'

3rd F2L pair
Same as for the 1st F2L pair, that's a good solution if you don't want to use fancy algs. I'll just say that doing y' U R U2 R' U' L' U L is better than doing U y' R U2 R' U' L' U L since it allows the first part of the alg to be regripless. As a rule of thumb: rotate before starting your alg. Edit: you don't even need to rotate for this case, you can do U L' U L2 U' L', which is just L' U L + L U' L'.

4th F2L pair
Good solution.
Another solution would be: U2 F (R U R' U') F' (U R U' R'). That's a good solution because it's rotationless and it's F (sexy) F' (inverse sexy)

OLL
Nothing to say here

PLL
Don't rotate during PLL, unless there's a rotation in your alg. It's faster to follow this pattern: AUF - alg - AUF than this one: AUF - rotation - alg - AUF

R2 D2 L2 U' R2 U2 F2 R2 F2 U F2 L' D' B' D2 B2 U2 L' U R'

z2 x // Inspection
M U' M2' Uw R Uw' Rw' //F2B(7/7)
Uw M' Uw' M'//Fix Centres(4/11)
U' U' R U2' R' U2 R' F R F' // CMLL(10/21)
U M' U M' U M2' U2 M2' // LSE(8/29)
//21:50, 1/11/2019
//8.86s, 3.27 TPS