This review is primarily for Mandalay Bay's casino. I stayed at THEHotel and have a separate review for that joint.
As far as Mandalay's casino goes, I have a hard time complaining. They offer up the usual compliment of card tables, slots, video crack (poker), craps, a huge sports book and all sorts of high-roller action. For me, it was all about penny slots and blackjack here. I discovered a unicorn-themed penny slot machine that magically granted me $30+ in winnings on my first night in the casino. I could almost smell the rainbows.
Second night I posted up at a $15 minimum blackjack table, and while I wish these casinos would have at least one $5 minimum table I know that $15 is the new strip standard. Regardless, after three hours and at least as many dealers I walked away 150% richer and with no less than 15 Kennedy-heads in my pocket. Did I say walk? I meant stumble. And the only reason I left is that they closed down the pit for cleaning.
Otherwise it's a pretty clean casino, nice and hidden down at the end of the strip, and there are plenty of places to fuel up for a night elsewhere on the strip.