I was recently booked at the Mandalay Bay for Autodesk University, but when I went to check in I was notified that I'd been upgraded to the Four Seasons. Not sure why, but it was a welcome surprise nonetheless.
The Four Seasons is connected to the Mandalay, but is smoke free and casino free. It's exceptionally posh and all of the employees are beyond helpful and friendly.
My room was fantastic - stocked with a great mini bar and fabulous L'Occitane bath products. Awesome shower and killer sunken tub. Wish I actually had a chance to use that tub, but sadly it was a quick trip. Wake up calls were friendly and on-time. Also, the cleaning service couldn't be better.
Would I spend my own cash-ola on this place? Probably not. Well, maybe, if I actually had money, but that's neither here nor there. Overall it was an exceptional stay and I would absolutely recommend it if someone wanted a quieter, more personal experience in Las Vegas.