definitely one of the best hotel experiences i've had in vegas. room was immaculate, amenities were great and they even delivered contact lens solution and a case to us free of charge when we discovered we had left them behind at midnight. great service.
the casino has a "classier" feel than many other upscale hotels in vegas - beautiful designs, spacious areas, etc.
the buffet is also awesome.
the only issue we had was that despite being on the 35th floor, we could still hear loud music late into the wee hours of the night on friday and saturday from xs (the encore's nightclubs are partially outside, meaning the music is extra loud). made it difficult to sleep - recommend asking for a room facing the strip or at least higher up to solve this issue.