I picked out this mower for the neighbors lawn who I mow. (she bought it). Its the 52" deck with 19hp Kawi. The first one I rode on at one dealer felt really nervious witht the controll levers. I ended up picking the same model at another Toro dealer nearby. This one seems slow for the levers to respond at slow speeds and change of direction. This is the first zero turn I have mowed with so maybe its me. Is there any adjustment in the drive system?