We stayed at the Wynn through a special deal with a credit card I have. We actually stayed in the Encore Tower so please be aware of this. It is possible to choose where you are. The room was upgraded and was quite amazing. The issue with the Wynn was that the minibar and room service seemed expensive even by Vegas standards. The casino floor is one of the plushest in Las Vegas but a little sedate. That is easily made up by the signature nightclubs on the property which attract clientele from the whole of Las Vegas. The pools are also top notch and upscale.
I would certainly recommend the Wynn to stay and party but you do need deep pockets by Las Vegas standards.