Had my Up! for just over a month and completed 1200 miles. Have started to increase revs and finding the car is smooth and responsive. The engine and gearbox is quiet, on tick over only know the engine is on by the rev counter, and kick down produces acceptable acceleration. True it is not as fast as my previous 1 series but averaging 55 miles per gallon and low road tax is a boon. I am happy with all aspects of the car and have no desire to carry out any modifications. One advantage of lifeshine appears to be that when it rains overnight the car is almost self cleaning.