I stayed in this room for 3 months. The room is small but has everything I needed (bed is comfortable, desk, chair and wardrobe). It is also a very silent room so it is perfect if you need to work or study there. Temperature was mostly nice.
Both the kitchen and the bathroom are fine, they get cleaned by a professional every two weeks so it is important that all the roommates cooperate to maintain these rooms tidy enough. Two of the roommates have been living in the flat for a long time, and they are very friendly, respectful and helpful.
There is no washing machine nor drier, but you can go to "castle dry cleaners" which is less than 3 minutes away (4£ wash, 3£ dry).
The location is really great. Lots of buses that will take you to the center of London in less than 30 minutes and also the elephant & castle underground station, which is less than 10 minutes away from the house.
The neighborhood is nice and quiet and has all the services one could need.
I would totally recommend this room to anyone who would need somewhere to stay in London, regardless of how long.