The room itself is cozy and is an optimal size for a long stay (I stayed for 3 weeks and never regretted it), the bathroom is an evident plus, especially considering how a hot shower is a must after a tiring day. The kitchen is also quite modern, you can always ask for own spot in the fridge. The bed is really soft and clean. You can see the Shard and a local Church from the window, which is quite nice.
The place is absolutely superb - 10 minutes walk from the London Tower and the Tower Hill Underground, 20 minutes cycling (a Santander cycle dock is right on the next street) to the city center. Everything is really close by, and the borough is very safe and calm.
Marcelo and his mom are really sweet, they keep the house clean and comfortable. Overall, the place is 10/10 in terms of money/value relation. I would definitely stay here again should I come back to London.