I just returned from Vegas for a holiday girls' trip, and the Spa at MOLAS was one of our stops during our vacation.  My travel partner works concierge at the spa at Mandarin Oriental's DC location, so she was interested and checking out the facility even though neither of us could spare the cash to splurge on a treatment here.  This review is strictly for the facilities, which I simultaneously found both incredibly impressive and disappointing.  Disappointing only because the spa lacks some of my favorite standard spa amenities like a jacuzzi (they only had a warm \""vitality pool\"" which was at least 10 degrees cooler than how I would run my bath) and a sauna.  To me, use of the spa facilities are half the draw of visiting a spa even when I do book treatments so the lack of some of my favorite amenities was a bit of a bummer.  That aside, this spa has a lot going for it.  The spa areas were immaculately clean, attractively modern in their design, offered stellar views of the strip, and had a lot of cool techy features like experience showers with touch screen menus and the ability to turn on the jets for the vitality pool on a station/lounger by station/lounger basis rather than for the whole pool.  Their relation room is one of the nicest and most relaxing one I've ever been in, with plenty of beds situated in front of windows overlooking the strip to rest in while waiting for your appointment or just to get some rest.  Finally, I can't say enough good things about their staff.  The service was top notch, friendly and extremely attentive without being obtrusive.  Always there to offer you a towel, a bottle of water or to fetch eye makeup remover for when the experience showers have ruined your eyeliner and you've neglected to bring your own.  Really top notch service.