Comment by gambiting

>>often is annoying when coming to a stop at a stopsign to have car turn off momentarily for no benefit

The benefit is that it's nice an quiet. I don't care about the fuel saving.

>>it worth it the added cost to my vehicle

I'm not sure what that cost is, even if there is one. My XC60 got rid of the starter motor and just uses then ISG which it would have to have anyway being a plug in hybrid. The engine obviously has to start and stop at any moment to allow EV running too, so that engineering had to be done anyway.

But I had one of the early S/S systems in a 2013 Nissan Qashqai and I never had any issues with it in my 7 years of ownership, not entirely sure if it added anything to the price of the vehicle as the previous model year with the same engine but no S/S cost exactly the same.