Being a local of Las Vegas, I know there are several saved options, but this is the way to luxury! If you want to be kind to yourself this is the best spa!
I especially recommend the couples facial. The facility has steam, jacuzzi, dry sauna, salt room, and wave room.
They have two unisex rooms to meet with the other half.
If you don't want to get a service, but want to do the facility, the price is right.