Can't help with coupons, but contrary to Franco's experience, we'd put the Wicked Spoon Buffet at the pinnacle of LV buffets. Same quality as Bellagio & Wynn (and cheaper, as well). Most of the food items are gourmet type, and not necessarily steak and potatoes. We also liked the small individual pots the items are served in. Enough different salads to make a whole meal, though I can't vouch that they are low calorie.
Great homemade fudge and other items on the dessert table. Based on previous comments about it, I think Franco must have just gone on a bad day.
Roy