The wicked spoon is awesome and my favorite buffet in Vegas (so far at least!). I've been for both dinner and brunch and find the brunch experience is my favorite. I've actually never had to wait to get in, not sure if that's luck or by design as I've come on weekends at what I would think would be peak times. I've also had good service each time, have done the bottomless beverages and one time our server even brought the bottle to the table to speed things up. It's great going for another round of food to come back to a cleared table and refilled drinks.
Good variety of food. The nice thing about this buffet is they have cute small serving dishes of various foods which make the buffet move quickly and allow for being able to try lots of things. I love the spicy Mac and cheese and the strawberry balsamic gelato which are both a must try. The dessert bar is amazing!