I used the Bell shuttle for round-trip transportation between the Las Vegas airport and Trump Tower. I didn't book until the day before my trip, but had no problems. The instructions I received were clear and I had no problems locating the ticket booth once I exited the airport. The van was filled to capacity. I was taken right to the front doors of my hotel. For my return trip, I called the night before and they gave me a pick-up time.....3 hours before my flight. The van arrived a few minutes ahead of schedule. The drivers were very courteous and helpful. They handled my luggage willingly and gave helpful hints about Las Vegas. The rate was very reasonable.....much less than a taxi and even the hotel shuttle. I would not hesitate to use this transfer service again.
I've read the other reviews about having to wait until the van filled. My flight arrived midday and the van filled very, very quickly. Perhaps people arriving during non-peak times would be better off hiring a car or using a taxi.