ran stress test for 10 mins, surfed a few sites, played angry birds and a few other apps and seemed very smooth. I can say a definite improvement from stock for sure. No force closes or sync problems, no noticeable lag from what I did.
Also, I reinstalled voodoo and theres no problems so its fairly easy to hop back and forth. All I did was clockwork, wipe davlik cache, and reinstall 1200sv voodoo. I wipe davlik out of habit so I'm not saying you have to.
Easy back and forth with no issues. Colorfix is tough, I "guess" the colors were better I am going back to test20 for now and Ill use it for the next day to see how everyday performance is. Of course I'm sure a new one will be up, ha!
Love playing with this phone.