You are not asking what it does, that's been explained. You are asking for some kind of subjective evaluation of the suspension, when you should just find a dealer that has a car with it (even a used one) and find out for yourself.
In a nutshell, since you drive on city streets the primary advantage is that the active suspension will soak up bumps better than the stock suspension. However if you are buying a no-lines model and keeping it long term and aren't a sport-oriented driver then you might be better off saving your money as the adaptive suspension will cost more to service/replace components on, down the road.
** Removed - Tim330i **