I spent the past weekend at the Residence Inn Mystic Groton while attending a wedding in the area. I have to say I was pleasantly surprised at how nice the stay was and how the hotel overall exceeded my expectations. The hotel is older, and has some challenges with curb appeal. There were a few bulbs burnt out in the parking area and overall the exterior could be spruced up a bit. My first impression left me a little apprehensive about how the stay was going to go. I checked in through the app and got sent a mobile key. The key would not work so I had to go to the lobby for a physical key but I think it was a problem with my app since I shared the mobile key with my wife and hers worked fine. We were placed in a large corner room which, to my surprise, had a whirlpool tub which I was not expecting. The room itself was extremely clean, this hotel room was probably one of the cleanest hotel rooms I have stayed in. I saw nothing that would make me question that the room was not cleaned thoroughly. There were no hairs on the floor, no crumbs in the drawers, all the kitchen items were spotless, the towels and bed linens were bright white. The bathroom was immaculate. Even the whirlpool tub, which I did not use, appeared clean with no built up gunk around the jets or drain that you sometimes see. I am really impressed with how clean the room was. I also should mention the room we were in was right next to the stairs/entrance and I was concerned it would be noisy but the room was very quiet. The only two minor issues I saw with the room was the bed skirt was too small for the box spring and the front of the dresser was damaged at the bottom. The public areas of the hotel were also very clean. As an older hotel I know it is hard to keep everything looking clean but the staff here does a great job from what I saw during my stay. I had a couple of interactions with the front desk staff and both times they were friendly and efficient. Other staff were pleasant and smiled and said hello when they passed by me. One thing that could be improved upon was the market in the lobby was not very well stocked, it appeared they were out of some items, they had beer but no wine, and no water when I went to purchase some one of the evenings. Some shelves were empty. It would have been nice to have a better selection of things to purchase. Overall though, this stay was great and I was really impressed at the overall cleanliness of the property. Way to go housekeeping department! I would not hesitate to return to this hotel if I return to the area in the future.