Right, alot put them on, then the smart ones take it off because of the issues or headaches that follow shortly after installing them. Most cars around dont need them, except for the "wow" factor. I just recently put my Cobb XLE BOV back to full recirc, and I can still hear it go off and its annoying amongst the other noises my car makes. But I know that everyone likes something different. I hope it suits your taste well and you enjoy it.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX