Wow, what a great place! I've been to my fair share of spas before and this one was probably the best I've been to. As others have mentioned, they give discounts to local residents and they do tack on an 18% gratuity.
The staff out front was very nice and extremely helpful and the technicians were amazing. I would definitely recommend this place to anyone in the area! Additionally, they have their own parking area so you don't have to walk through the casino or hotel area.