We booked a round trip car service for our just returned trip, we were there May 9-18th.
I highly recommend Tiffany town car. we booked 2 weeks in advance, online form for putting in flight numbers, times and place you are going to, gave them a credit card number but they dont charge you until the day you arrive(they dont like to pre charge in case your flight or trip gets cancelled) They text you the day before each of your flights with the drivers picture and name and to confirm. I just reply great thank you.
Our driver for our arrival was there even before the expected time and she was fabulous, her name is Renata. She picked us up right at baggage claim. She texted us multiple times to check on us while waiting for baggage and i let her know when we had our bags. She had us at our resort in 1/2 hr.
they will happily stop at a grocery store if you need it, we did not.
On our return flight Eddie was also there early(but they will certainly wait), he also texted us and kept us in the loop. They pick you up 2 hours before your flight time and had us at the curb outside the ticket counter in 1/2 hr.
my hubbys co-worker has used them for 15 years and she has had great service every time and recommends them to everyone she knows going to WDW. We are certainly converts and will most happily use them every trip from now on. You can ask for drivers so a huge shout out to Eddie and Renata. They are the best!