This is probably my favorite buffet of the ones I've been to in Vegas. It's not cheap by any means but the quality of the food you get is excellent. The staff is friendly and attentive and we always had our drinks full.
What makes them stand out is their ability to do ethnic food well. I had some of their Indian dishes which were superb. Their naan was yummy and filling. But my favorite dish of all was their chicken panang curry which was just as good as any I've had at most Thai restaurants.
Overall, its a great value for the Wynn. It's even better than some of the other restaurants at the resort (ahem Bartolotta)