I was recommended to use Ace through someone at my venue (who's using them for her own wedding). Very professional, on-time, delivered on whatever they promised. My guests were very happy, and relaxed to be driven back and forth to the ceremony sites by them. My only negative was that it was a little hard to get ahold of them in the beginning. Otherwise, no complaints, and no babysitting necessary. They came, went, got paid, and I didn't even need to call or check on them.