I don't hate BOV's, just a lot of people swap them over and pay the price (poor running etc), and then come back in a few months with another thread about stalling/backfiring or economy etc.
If you go about it the right way however (which means retune, custom work etc), then it's all good.
There just aren't a lot of people willing to do things properly and then complain about the half-baked set-up that results.