This was only my second airbnb stay so I wasn't sure what to expect.
The positives of the stay would be a friendly host, great location for Heathrow and transportation as well as being very clean and a well maintained property.
The negatives:
I booked 2 rooms for 4 adults, my room had a single bed and a fold up camp bed. No drawers, no place to hang clothes. There was no en-suite so we shared a bathroom with at least 3 other guests. The room was adjacent to the stairs and next to the kitchen, so was very noisy until after midnight. Oh, and to get to the bathroom we had to walk through the kitchen.
If we had booked for more than one night, I am sorry to say that I would have left and moved to a hotel.
My advice if planning to stay at Swan House is to get the full details for your room before paying. My advice to Vladimir would be to take a look at the room that I stayed in and make some improvements to compensate for no bathroom, and limit it to a single bed.