Check in is a bit chaotic. We stayed here twice within a two week period and both instances were like this. Also to note, that we received different room amenities with the same airbnb booking (ie once we had a full kitchen and washing machine, and the second time we didn’t).
Despite this, the rooms were clean and comfortable. The staff was very helpful (one front of desk staff member actually went and set up a second bed in our room himself when he realized it hadn’t been done). The shower was hot, the wifi was strong, and the location can’t be beat - we had a view of the Tower of London from our window, and were a 1 min walk to the tube. If you can have a bit of patience with the longer check in, the rest is worth it!