The Aliante Feast Buffet is ok. Nothing there is spectacular or interestingly different, but I have never left feeling hungry. I've eaten all the buffets before, but we typically go for lunch every couple months when I have the spare points. I'm not certain I would ever pay full price for the food, as you can get a better buffet downtown at Main Street, where the food seems a bit fresher.
The desserts are probably my favorite part. They have a variety of pies, as well as mini desserts
Overall, if you are already in the area, it's fine, but don't go out of your way to visit this buffet, as you can get the same thing at whichever Station casino is closest.