i have used the Roundtrip shared transfer many times and find it excellent. It saves a lot of hassle both at the airport and the hotel and takes all the stress out of having to arrange your own transfers. Always use and will continue to use when ever going to America.
Brilliant service, took a little longer on the arrival trip as there were 3 other drop offs before us. Just us on the departure trip so no waiting. Overall a great inexpensive way to get the family and lots of luggage to and from the airport.