Carla and her husband have created a thoughtful and inviting space for guests to settle in to. Although the kitchen and living room are off limits, the room and rest of the amenities (ie. water heater, complimentary tea and coffee, tv, clean bathroom, bed) were perfect and sufficient for my 2 night stay at her place. Check-in was really easy---Carla actually went ahead and gave me a call to explain how to get into the place (lockbox on door). The apartment is very quiet since it is located on a fourth floor walk-up and is facing away from the street. I am a really light sleeper, but even I was able to fall asleep soundly in the room. As for the room itself, the bed and the sheets were super comfortable and soft---I slept so well those two nights!! The wifi had a slightly weak signal in the room itself, so I had to walk closer to living room to connect to it at first, but after that the signal kept just fine. There is also an AC unit in the room which is a plus (and it is not too noisy like some I've heard).
I got to meet Carla, her husband, and their dog (such a cute frenchie btw) in the morning before I left. They are such a sweet couple and I wish I had more time to talk to them. I found out that Carla was originally from the small town where I went for my undergrad education---what a small world it is!
tl;dr would def recommend this place and is one of the better airbnbs I've stayed in around Columbia U!