GAN's really fallen in recent years. There's a ton of good cubes out there, but unless you go back to the Gan 12, not worth it.

I haven't really turned a 3x3 for speed in a while.. but at the end I was using a Tornado V2, cheaper, and better than the Gan. Now there's better than that.

If you are interested watch the stuff from "The Cubicle" Phil does a good job of breaking down cubes and giving an honest opinion.