You're essentially paying $5 a ride to escape from the middle of a casino and bypass all the crowds on the streets. The price of this luxury is of course steep, but you can get a code to cheapen the fare from any concierge at your casino. It's still really expensive and I'd stay off it if it's not 115 degrees out. But that can happen...
Be sure to ask, "Is there a chance the track could bend?" because someone will either stare or give you the secret reply back.