I’ve got SRAM x5 that came with my fatty.
On the downside they had a creak for ages that I couldn’t find until it magically went away on the umpteenth disassembly and clean!
On the upside they have a significantly lower q-factor than the race face cranks by about 20mm according to the spec sheets.
On the other downside the GXP bb sucks, the plastic top hat is pushed out of the drive side (which is probably what started the creaking). Finally solved it by replacing it with a Hope BB. Other non-SRAM BB didn’t help as the whole bearing just migrated out instead.
It may be possible to solve the problem with a diy spacer on the axle (a bit like the older race face system) to preload the plastic top hat and keep it in place. But it was creaking and I gave up on that in trying to make it stop (it didn’t so I may still be a good solution)