Where to find quality puzzles?

[fleeting_penguin]

For Christmas, I got a Dogic and Impossiball from Mefferts, and I have had nothing but pain and tears playing with each of them. The pieces pop way too often, and I can never get through a puzzle without me wondering every turn if something is going to pop. Did I get a bad batch or something?

Are there any guides on how to re-assemble an Impossiball? Mine is currently in pieces.

I'm also looking for a speedcubing quality megaminx, pyraminx, and square-1. I have all of them, but only cheap knockoffs that don't turn well. I was thinking about getting the megaminx from Mefferts, but now I don't know.

EDIT: Also, the 4x4x4 and 5x5x5 cubes I have from the Rubiks company explicitly say they are not for speedcubing. I have also heard that these puzzles have a tendency to have pieces break. Where can I find quality larger cubes?

 

[Morley]

For the 4x4x4 and 5x5x You can use the Rubik's brand cubes. I think the company just doesn't want to be responsible if they do break because you were trying to cut corners or something. I have a Rubik's brand of each and I like the 4x4x4 but the 5x5x5 jams way to much for me. I have never used any other brands of these though so I don't have much to go by.

This thread has a comparison of the different brands and such.

 

[Demon Parasite]

Meffert's megaminx is supposed to be the best one, and the DIY sq-1s from cube4you move good. The half-twist moves good, but the top and bottom layers are rough, you need to lube it.