[CASHDT]

If you look most of the popular hotel’s and even other no affiliated hotel spas in Vegas, prices are never listed!! At least here you know what you’ll be spending which is important when your planning a vacation trip.
Here is a comparison I found that is equivalent, meaning it is the same facial since there are so many different types you can get.

50 Minutes - $120 Hilton’s Rejuvinating Facial
25 Minutes - $65 Hilton’s Express Facial
Source: http://www.lvhilton.com/spa/facials.shtml

I believe Esthetique by Genavee will usually beat others is because it is one esthetician specializing only in facials. Probably has lower overhead than the competition. So if your looking for all the extras a regular spa would have (ie. massage, salon services) you will not find it here. Only good facial treatments!