We used to pay the $30-40 for the shuttle bus to the hotel from the airport. The "wax" is only $2!
I totally recommend its use. I would suggest you plan out where to get on and off the bus before your trip. Seems like common sense, but we skipped that part until we were there and facing the dilemma. Thank God for smartphones and the internet!
Update, its been a few years since the first part of this review. I'm still using the wax when I'm in Vegas..
I get on the bus at the airport at "level 0" the bus takes me right to Fremont St (the end down by the Walgreens)... When I'm ready to leave, I get the bus at "casino center stop", right outside of Binions. It takes me right back to "level 0" and off I go...