I think I'm gonna get these too in a few weeks.... main reason is price... since I have to get new rims because I dont feel like dropping $$ on unbending my current rims, will go with ASA or AT Itialia throwin star reps package from Tirerack.
I read all the reviews and they sound great, I'm sure once they really become popular the price will increase.
Current
2008 M5 6 Spd
2000 Z3 2.8 5 Spd MSport
2012 X5 35d Sport
1995 540i 6 Spd
1992 535i 5 Spd
Former
1995 530iA
1986 635CSI 5 Spd
2011 X3 2.8 MSport