I would highly recommend this room for a single traveler, especially because Sam is very responsive & accommodating. I looked at a lot of Airbnbs online and I also saw two others that my friends stayed at. I made the right choice :)
This is a good room and Sam is a great host. Sam was easy to get in touch with and went the extra mile to make sure check-in was straightforward and simple. He stayed in touch to make sure everything was good, and he was responsive to messages and requests to get a towel, leave my luggage in the room after check-in, and answer questions about bus routes.
The room itself is as small as the picture suggests, but it is well-lit during the day, all the furniture is nice, the room is well decorated, and because it's on the 10th floor, it's relatively quiet (for Hong Kong). It is on a main road, but the window faces a quieter street. You will, however, hear your neighbors come and go (but this is probably unavoidable at this budget). The cleaners come in the afternoons. The bed is comfortable and the A/C is adjustable and quiet as well.
If you are travelling with others, perhaps request multiple rooms on this floor, if possible. From the elevator, there is a hall with a door that leads to a small "lobby", which acts as a hall to about four or five other similar rooms. My friends stayed at Airbnbs that were very close and had a little more square footage, but they didn't have the nice atmosphere that this room had. The Muji decor is a nice touch.
Also, there is Starbucks, Saint's Ape (boba shop), and 7-Eleven all on the same block. Great local food within blocks. And the A22 bus (to and from the airport) is also very convenient.