This is a family owned and run hostel that has been generationally passed down. It is affordable, well run, you always have hot water, and the staff are very welcoming and helpful and keep the bathrooms clean (which is quite a task!). In addition, there are lockers under the beds where you can store your stuff (just bring a lock), the breakfast is good and predictable and there is an optional dinner you can sign up for every evening. There is a football match on nearly every evening to boot (in season of course)! It is only a 5 min walk from the tube (Stamford Bridge is only 2 stops away!) and restaurants abound. A couple of things you won't know from booking here: there is a 10 pound refundable deposit for the room key (bring cash), bring a towel (but a small travel towel on Amazon) and soap/shampoo with you (or buy it at the grocery store when you arrive), and they have deals on weekly rates of you book with them directly and you don't start your stay on the weekend. Overall, I'd go back in a heartbeat. Next time you travel to London, don't stay at a hotel, support a local family that is doing good work in the city. Stay at St James Backpackers!
