I just got from vegas. The last time I ate at the Bellagio Buffet about 7 years ago, I recall a better experience. Simple from one item, the king crab legs. The crab legs just seemed so water logged this past week.
Everything else was pretty good. Yet, I probably only found about 10% of the stuff worthy of my palate. Oddly, my favorite item was the cheesy bread sticks! I ate a million of them!
The miso soup was too salty.
The sushi bar was good for non sushi items... like the raw tuna salad thing (all meat) or the steak tartar. I didn't bother with the sushi rolls.
The pesto mashed potatoes was amazing.
Cleaned gulf shrimp were very good.
Overall opinion... too much random non-good stuff, but worth eating at