I booked a transfer to go to our hotel from Ciampino airport and it was so quick and great. Our flight was late and our driver was waiting for us at the airport and in less than half an hour we were at our hotel. 100 recommend it.
However, we also booked this for the return journey from our hotel to the airport. The driver for the return journey was lovely, very smart, very polite, and pointed out various places en route. Also, much nicer vehicle!