This shuttle was the recommended transport to and from the airport for Harrah's. It's not a free shuttle for the hotel, but the cost isn't too bad at $15 for round trip.
Uber and Lyft have really made services like these obsolete. My trip to the hotel was cramped and bumpy. They don't have much of a spring system on their van.
For my trip to the airport, they make you arrive 3 hours early. So for my 5:50 flight, they would only allow me to take a 3 am shuttle. I arrived at the airport even before United began allowing people to check in. This shuttle was mostly empty but the driver didn't get out to help me with my luggage, and the shuttle smelled like urine.