I LOVE WAX!
If you are travelling to Vegas for a weekend, I highly recommend WAX. Of course, if you are from Europe and have 5 bags with you, you should probably consider a taxi. Not that there are not enough room on the bus, it is just more convenient to drag around your luggages. But just for the record in my own experience, nobody really takes this bus to/from the airpot so it is ALWAYS empty. I never had to stand up.
It is 10 minutes from the Strip and probably 30 minutes from downtown Vegas. Super convenient.
I was going to buy a 3-day pass from the airport like I would normally do from a bus stop ticket machine. However, they only offer 2-hour and 24-hour pass ($8) here at the ticket machine. WAX runs on each hour but other buses run more frequently. You can also pay for one trip only for $2. Also, they take credit card ONLY at the ticket machine. You can also pay with cash once you are on the bus.