I was recently in Macau looking for buffets (see the Trip Report in my signature, below). I tried Fogo Samba (buffet/all you can east Brazilian meat) at the Venetian and it was quite poor. I also tried the breakfast buffet at Cafe Deco at the Venetian and was quite underwhelmed. I didn't try others though, perhaps fortunately. Based upon my experiences there, I would do not consider this a good buffet town, and if I were to go again, which I doubt, I would definitely stick with some of the authentic Portuguese and Macanese restaurants in town.