I have used Ace twice for scheduled early morning rides to the airport. Both times, the operator I spoke to the night before was organized and friendly. Taxi was 5 minutes early both times, but didn't try to rush me out the door or charge me for the wait time. The first time, the driver was ranting to me about taxi vs. uber at 7 am, which wasn't ideal. I think he also took a short wrong turn somewhere. He'd get a 3 star rating, but still acceptable since he was on time and got me to the airport reliably. So I called again for my next trip - second driver was pleasant, on time, no wrong turns, and would get 5 stars. So, on average - 4 stars by performing where it counts in terms of being on time in the early morning. I plan to call again for another trip if needed.