If you're willing to commit, it will save you money, but overall I found the buffets this gets you into underwhelming. Also, I am a fat, fat man, but I still couldn't get in that fourth meal in the 24 hours; I thought I was going to die after 3. The biggest thing is that it allows slightly cheaper access to the Ceasar's buffet, but if you're going to do that, you should probably just commit to bingeing like the Romans reportedly did, and then not eat for a day or two while it digests.
All told, I wouldn't do it again.