I learned it by watching a video which pretty much broke it down to 4 cases and teaching you what to do in each case. It's not that hard. You can learn it in a day or two. It's one of the F2L videos on youtube.
48 point edge mod. Lubed with CRC silicone for 3 months to break it in. Cleaned out the CRC and lubed with Traxxas 30K like a Lubix Ultimate GuHong. Changed to half-bright plus bright blue Cubesmith stickers. It's really smooth and silky now.
You need to lube it before you can make any assumptions about it's corner cutting, also try tensioning it. If it's popping, tighten it. Try find some CRC or Jigaloo. Get lubix or traxxas if you can wait a couple of days/weeks for shipping.
GuHong V1 lubed with CRC, I may change the scores once I lube it with Diff Oil
Smoothness/Speed:8 (sorta smooth, but not very fast)
Lockup Resistance: 8 (No big lock ups, just catching)
Cutting Corners: 9 (most sides do 45+)
Pop Resistance: 8 (pops occasionally)
Quietness: 7 (fairly clicky...