My wife and I stayed here for two nights in late August.  We liked it quite a bit, but there were a few small irritations that annoyed me - not deal breakers, just irritants.  I would stay here again if I get a good deal on the room rate.\n\nFirst the Pros:  The Aria is quite new, so everything is modern, clean, and not showing any wear or grime.  There are lots of restaurants located on the casino level and the Promenade level, at least three places for coffee (including Starbucks), and a spacious Jean Philippe Patisserie that serves beautiful pastries as well as sandwiches.  The casino is huge, doesn't reek of smoke, is well-lit and pleasantly quiet, not frantic and deafening.  Outside are two water features that I found mesmerizing: a \"waterfall wall\" and a fountain with a unique lighting system and different spray programs.\n\nThe hotel staff was very efficient, polite and courteous.  Even all the housekeepers smile and say \"good morning\" when you pass in the hall.  Security (there were many) and casino workers were likewise pleasant and helpful.\n\nIn the room, everything electronic is/can be controlled by a master LCD touch panel (like a tablet) on the nightstand.  So when you go to bed, one tap on an icon will turn off all lights and TV, and close the drapes.  The panel also serves as a clock and you can set an alarm if you wish.  It also controls the air conditioner and TV.  I think you can change channels with it too, but there is a regular remote control for that as well.  The bathroom has double sinks and a separate toilet area.  Towels are thick and fluffy, and they even provide robes for you to use.  We did not use the bath sundries provided.\n\nI liked the master on/off light switch and the \"Privacy\" and \"Service\" switches next to the door that illuminated signs outside, which replace the old doorknob hang tags.\n\nElevators are fast and plentiful.  For efficiency, they provide six elevators for every 12 floors or so, so depending on which floor you're on, you must take a certain bank of elevators.  There is a free electric air-conditioned tram that shuttles you between the adjacent Monte Carlo and Bellagio Hotels.  If they could only extend this to the entire Strip!\n\nNow the Cons:  As other yelpers pointed out, you do a lot of walking at this hotel (but this helps you burn off the calories that you're consuming in Vegas!)  If you self-park there is a long walk to the front desk to check in because first you have to reach the hotel, then you must trek through the entire length of the casino to reach the front desk.  I fumed about this until my wife pointed out that the front desk is at the FRONT of the hotel (closest to Las Vegas Blvd. and where the taxis and valet parking are) so that made sense.  Besides, you only check in once, then you never have to do the hike again.  The walk back to your car really isn't that long; it is comparable to most other Vegas Strip hotels, I think.  But to get to the Strip itself you have to walk through the adjacent Crystals Mall instead of just through the casino.  There can be a long walk from the elevator to your room, however, since it is a large hotel and one bank of elevators per floor.\n\nI did not care for the electronic control panel in the room.  There is an annoying 2-second delay between tapping the icon and the action taking place, as another yelper mentioned.  This can and should be fixed.  I mostly preferred to disregard the touch pad and just use the regular on/off switches on the lamps and the wall switch for the drapes.\n\nThe wireless internet in the room is slow!  When you login it tells you it is 1Mb per second.  Really?  Can't they at least do 10Mbs which is the slowest you can do at your own home these days?  And for this you pay $28 per day (resort fee is $25 + $3 tax..they don't tell you about the tax until you look at your bill).  The resort fee entitles you to a daily newspaper (but you have to go get it) and access to the workout room (I didn't try).\n\nOur king bed was soft and comfortable but my side of it was saggy.  I attribute it to guests sitting on it repeatedly in that spot because the control panel is on that nightstand and you have to sit to operate it.  Aria management should look into this phenomenon as a byproduct of the control panel (Note to management if you're reading: Room 19225).\n\nLastly, we had two electrical problems in our room.  One was a burned out bulb, then the next morning we discovered that the bathroom duplex outlet and some of the lights didn't work.  We called downstairs and they quickly sent an electrician both times.  He apologized for the inconvenience (praise to him for speaking on behalf of the hotel) and fixed the problems in good time.  He said the lighted makeup mirror in the bathroom had malfunctioned and blew the electrical circuit.  He fixed the GFI outlet and replaced the lighted mirror.  Great and efficient service fixed the problem!\n\nBottom Line: minor irritants but a fine hotel!