It depends what your definition of "a ton of time" is. I took the Deuce from the Flamingo to downtown and it took forever (over 1 hour). It stops everywhere, and I mean everywhere. It is advertised to tourists, but on my ride was mostly locals travelling to and from work, shopping, etc. On the way back, I got off at Circus Circus and walked the rest of the way. BTW It took over 45 minutes to get from downtown (Neonopolis) to Circus Circus.
I don't know if it is always like this. I do know that I will never ride the Deuce again.