You can expect a nice room with a big bed. The mattress is a bit soft but for few night is not a problem. The house have 4 rooms and they were all full and there is only one bathroom what means that sometimes it isnt so clean or you have to wait a little bit. The house is easy to reach by metro (London Bridge Station) but is not so close to city center.
Basically we enjoyed our stayed in London and we recommend this house