Did it make me a faster solver? No.
Does it feel like a premium 5x5? Absolutely.
It took me a few solves to really get the feel for this thing but now that it's broken in I'm loving it. The YJ MGC 5x5 is great, been using that one for years, but the GAN 5x5 just has such a nice smooth snappy feel. It's faster than I expected, but still pretty stable. Instantly my new 5x5 main.
It feels good. Get it. Don't sweat the price tag it's worth it.