Transgo kit regular city driving from a light. The car shifts very smoothly when under about 3200, but it does take some getting used to. The shifts are proportional to throttle and RPM. Low speed city driving, its delightful. My biggest complaint is mid range, it lunges violently when half throttle between 4 and 6k. The sweet spot is really below 3500 and above 7k. It's a bit obnoxious in the mid range where you dont really need it to lunge into gear.