This is a beautiful hotel. Our room was spacious, with a fantastic view of the Strip.
However, there were frustrations. When we arrived, we had got into our room, and a cleaner burst through the door unannounced; there seemed to be a reluctance to replenish our toiletries; our room often wasn't cleaned until after 4pm; and everything comes at an extra charge, including use of the gym and wifi.
Whilst the pool areas are large, the sunbeds are crammed in, and half the area is in complete shade for most of the afternoon.
We were at the Wynn for 10 days, which is a long time in Vegas. I suspect the above may not be so much of an issue for a shorter break.
The restauarnts are great. In particular, the Country Club for Sunday brunch is a must.