This is the best place to stay on the Strip with kids. Absolutely *impeccable* service, smoke-free, quiet, and tons of things to keep the kiddies busy: all the Mandalay pools & sharks and the monorail (perfect for my preschooler)! But then mommy and daddy get the Mandalay casino just steps away, 3 spas, and the rest of the Strip is just a cab ride away. We are already planning our next Vegas getaway.
One tip: I actually enjoyed the Four Seasons pool much better than the masses at MB. It's quieter and the service was perfection.