Plenty of options. $25 is a bit much for a no-service buffet. And they will want tip, but honestly that's par for the course. Lots of options, and they have gelato. It's probably the best buffet in town, worth the Lyft ride from the Golden Nugget--that buffet has nothing over Rio.
Be careful, if you have more than 2 plates, and you'll want to, you might end up looking like everyone that's at the buffet. Watch yourself!