I've found that the alignment will vary somewhat in the initial break-in phase, but after the pads are fully bedded in the alignment stays pretty good.rzozaya1969 said:
However, getting the same tension out of a quick release each time is a pretty tough trick. Buy some QuickNuts from 1UpUsa.com. I was a pretty big skeptic, but they were cheap so I bought a pair. I really love these things, much better than the bolt-ons I was using before. I'll put them on all my bikes with disc brakes in the future.