We just had the A/C drive belt replaced due to the squeal as well. Within a week of the first time it did it, it became intolerable.
We had an F30 328 for a loaner. We were so happy to get our d back. I don't think we'll be getting into an F30 anytime soon. Start/Stop is awful, idle is quite rough, steering numb, interior feels cheap, WTF is up with the cup holder lid?, too gadgety for it's own good.