Excellent value for a room in London with en-suite and cooking facilities. It is compact, but the size is actually bigger than you will generally find for that rate (or even higher) in London.
The room is also serviced on a daily basis.
The stairs are very steep and if you are on the top floor there are many of them to climb. Boris is completely upfront about them though, so this is not a criticism of the host - it is just something to bear in mind when booking if you are not physically fit.
We didn't meet Boris but had dealings with a lady who I assume is his wife, who was extremely friendly and helpful.