I will echo what others have said. Install while at times cheeky, is very doable. Just relax and enjoy it :)
Low end performance is improved as is delivery. Overall, the throttle response is just much smoother, and finely controlled rather than somewhat "notchy" when stock.
DEF worth doing for the performance, and the bling lol.
Reviewed by: Matt from North O' Boston on 10/4/2014