Haven't been using it too much yet, on my A1200/Mediator the gfx are corrupted and slow so I'm waiting for an update from HJF which will take care of the problems
On my A4000T/CV64 gfx card I've been using it briefly an evening after installing it and so far I'm impressed, tried Tunenet and did some web browsing and watched an mpeg movie with DVPlayer.
I'ts feels faster and more powerful that MorphOS PowerUP
