Do not use them even if you will be saving money compared to taking a taxi! They pick up once an hour on the hour, I was standing outside my hotel 15 mins prior to pick up and when 15 mind past the hour went by, I called only to find out "the driver already picked someone up" when I explained my situation to the 702-444-1234 phone # the said "sorry, another shuttle won't come for another hour so call customer complaint hotline" and she hung up on me. If they have a hotline just for complaints then they must not do a very good job!!! When speaking with valet and taxi drivers they advised this happens ALL THE TIME! So, if you want to catch your flight do not use them but if you do, be prepared. Taking a taxi is more than 4 times the amount but well worth the stress.