As ususal its a matter of prespective. For me its great. I wanted a little more ompff when entering the hiway and merging into traffic. I can stay in second and go from 40-65 fairly quick, not supercar quick but I can feel the acceleration. It also helps a little when your passing that 50 mph semi climbing that hill along the interstate. For me it was the safest route to go due to my inexpierence and lack of knowledge.
On the other hand for the car enthusiast or just for those who've had the expeirience of driving supercars will probably tell you " stage two is not fast". You won't get 0-60 in 4 seconds or run the 1/4 in 12 seconds but it is a different feel from stock.