I tried it because it sounds fun. Overall the experience was good, but I won't do it again. I don't have the disciplice of reigning myself from overeating. So much good foods and I cannot heklp myself staying away from them.
Choosing the right buffets may be the key for the success. Le Village buffet at Paris was not very pleasant experience. But I liked the Flavor at Harrah's and I loved the World Carnival buffet at Rio. In fact, I visited there twice. By the time I visited the Rio for the second time, I am so full that I could eat anymore. I decided not to spend extra money for the seafood buffet, which I liked to revisit after 15+ years.
One thing to keep in mind is that the buffet deal is for the member of the Total Rewards. Make sure you enroll the membership before you get in the line. I did that in Caesar's Palace and after I have to back out after more than 30 minutes of waiting because the total cost to eat at the Bacchanal Buffet is $85 for a non-member compare to $65 for a member.