Whenever I visit Las Vegas, I generally will eat at The Buffet at Monte Carlo. During my April 2016 vacation in Las Vegas, this was also the case.
I generally get comped here so I don't have to pay anything except for the tip but during my April 2016 I didn't get comped and I still continued my tradition of eating here since for the Strip (unless you want to go to the North-side of the Strip near Stratosphere), it is one of the lower priced buffets. You can also get a discount by purchasing a voucher at Tix4Tonight. I always eat at the Buffet at Monte Carlo on a weekday for a late lunch so I can't really comment on what additional options are available on the weekend.
As others have mentioned, you refill your own drinks here. Based on the other reviews, a lot of people seem to not like this but personally I don't have an issue with it since I enjoying mixing cranberry with orange juice and even sometimes enjoy mixing some of the soft drinks for variety.
I found the food to be okay. It is not bad but nothing really stood out for me. I know that this is weird but I did enjoy the corn on the cob, The shrimps were the smaller peel shrimps variety so was a bit messy. From the meat section, I found the beef to be a little bit on the tough side. I did enjoy the turkey. In buffets, I will generally have a few pieces of cantaloupe and the cantaloupe at The Buffet at Monte Carlo was hard. I've rarely had ripe/soft cantaloupe pieces in a buffet and since I've been here a lot, I knew it would be hard and somewhat tasteless but would give me the excuse of having some fruit in my meal.
The waiter did a good job at removing my finished plates and also giving me extra napkins when he saw me using my hands with the corn on the cob and shrimps.
I don't have an issue returning here during my next trip to Las Vegas when I'm in the South/Central part of the Strip and feel like having a buffet at a lower price.