IMO it is something that looks good on paper but in real life & testing it is not worth it. Its unproven for longevity yet, and not sure the upfront costs outweigh the long term gains even if you do that many city miles to recoup the costs. In addition it takes away from cargo capacity so if you plan on pushing the caps (RV, towing heavy) I'd watch the weights.
My wife drives a Audi Q7 and it has auto stop/start. Most annoying feature on the car, and I turn it off when I see it activate (doesn't do it all the time when stopped).
So should you get it? Only you can make that determination after weighing in the pros and cons, and to me it has more cons then pros so.......I made the right choice.