You aren't probably looking for a real B&B experience with somebody to talk to when you get home or even asking you what you would like for breakfast.
You are okay with an anonymous way of staying, where you get your access through a secret code shared online and are fine with accepting smaller difficulties (like missing cutlery in the kitchen or not knowing where to find spare toilet-paper) and the fact that, even if there are 2 bathrooms and 1 WC available, you might have to wait for your turn since 2 more rooms of the flat are rent to other persons.
You are mainly looking for a clean place to stay in London in an excellent position (very close to Euston and St.Pancras-King's Cross stations with several transport options, moreover British Museum, Camden Lock and other intersting spots are in walking distance).
Than this is the place to stay. Good value-for-money ratio.