Pros: very central location. Literally 5-7 min walk to Big Ben, London Eye, etc. There're a couple of 24 hour stores (one have wine 24 hrs) in about 10 min walk, affordable price for the location.
Cons: place is really old and small, hallway is very tiny, overall cleanliness is questionable, there's a train just outside your room and sometimes it's pretty noisy, neighborhood is kind of industrial due to the railroad, host asks you to spray and clean the shower after each use and tries to give you a lesson if you did it the way he doesn't like.
Overall experience is 50/50. Wouldn't stay again