Should have taken a taxi.  The shuttle doesn't leave the airport until it's completely full.  We sat on the shuttle for half an hour.  Luckily, the first stop was our hotel--The Venetian.\nI bought a round trip ticket but waiting for the pick-up at the hotel to return to the airport was very stressful.  They were 45 minutes late and we almost missed our flight.  We called 4 times to ask where the shuttle was and the answer was always the same--\""it's 5 minutes away\"".  Other people on the shuttle later told us that they were at the Palazzo sitting in the shuttle for 1/2 an hour before they finally left to pick us up at The Venetian. (they are neighboring casinos). Again, they waited until the shuttle was full with no regard to the agreed upon pick -up time for us.\nIt's just not worth it.  The money you might have saved would have been better spent on a more reliable service.  You're in Las Vegas for god's sake--you're going to spend money anyway.\nLesson learned.  If you are not in a hurry, then this might be a good option as it only cost $12.00 round trip per person.