Monte Carlo is an old, reliable friend. We've stayed here on three separate occasions spanning eight years. As far as Strip themes go, you're not going to find much of it here. Monte Carlo is built quite simply as a moderately priced, classy hotel. Depending on your timing, it is possible to land a stay here for a very friendly price.
Two things stand out to me whenever someone mentions the Monte Carlo:
1) The pool. We really enjoy the pool mostly because of the lazy river. It's very relaxing, and the poolside music is among the least annoying of places we've stayed.
2) The casino. Very friendly confines and it's never difficult to sit/play wherever you want.
Monte Carlo also has easy access out back to the neighboring casinos, so you don't have to sardine yourself down the Boulevard to get where you want to go. Anytime I'm heading to Vegas, Monte Carlo is in my top three choices for rates in the initial search. She's never let us down.