well, i went for a cheap chip from ebay, so i can't really say anything about evolve's tuning skills, i have only tested the car on their rolling road, no tuning involved. but judging on their customers (328i supercharged, a couple of e92 m3's, m5, z4m), i rekon their pretty good with their stuff. also, very friendly, sal from evolve even invited me inside his office to show me how he's doing the remaps and everything. a bit too technical for noobs, but still i found out some things very interesting. from me for evolve!