The hotel room is nestled into cosmopolitan and you dont even have to leave the hotel to access cosmopolitan, From there on to aria there is a sky bridge, which gives you access to the bellagio parkmgm train system. This makes it extremely convenient to navigate across the strip. Basically you can train hop easily across and mostly walk only one hotel. The hotel rooms were spacious and extremely clean.
The only real negative is the receptionist. They were kind of rude and non receptive to requests, often making you feel that they were doing you a favor by even talking to you. I asked them basic questions like is there a water fountain, their answer was "I guess there is somewhere inthe building, why dont you go to the third floor and buy yourself water from the vending machine". I was trying to avoid plastic waste and what I was greeted to was rudeness.