I recommend you stay away from this shuttle service. We required transportation from the airport to TI. We paid $7.50 per seat. We waited more than an 1 hour and 30 minutes to board the bus. In my opinion, there were not enough busses headed to the strip. Once on, the driver could not fit all the luggage and had to reorganize. He had to figure out our destinations, who had round trip or one was tickets and then give all the details for calling for pick up times. It would have simpler if he did this when he took our luggage but whatever. Then we were off, like a heard of turtles. The driver really gassed the bus when there were openings and charged threw the traffic. We made it, but at one point I was ready to get out and call a cab. It took over 2 hours to arrive at TI. It is a 12 minute drive when we drove ourselves in a rental car.
Save yourselves the headache. Spend the $$ and get a taxis or rental car!