I recently called and used the Green Cab company and could not have been more satisfied. They took my reservation the day prior to service, showed up right on time, the driver was _very_ courteous, friendly, and neatly-dressed, drove sanely, knew where he was going, and the car was a very clean, very new Prius! I will never call anyone else when I need a cab!
My brother left for Europe on 11/14/08 his flight was@ 6am after booking them online I got a phone call to confirm the address, date and flight number. I was told that it will be grace time of 15 min, the driver had arrived at 3am she was very friendly and my brother was very satisfied with their service.
I booked online a few days ago, and my flight plans changed today, so I went back to their site and I saw I could either cancel or edit my reservation right there on their site. They picked me up and all was great. It was so easy!