I obviously prefer boost of the turbocharged variety. My friend runs NNAAAWWWWSSS on his car, (the big bottles, and two of them! ) and it is a pain in the ass. We have rewired the system with relays twice and the damned thing still only works when it wants to. The bottle doesn't last that long, and the system is VERY picky with regards to bottle pressure which fluctuates greatly based on the fill and the temp.