Small, simple, but well-appointed room close to the city centre. The Victoria line connection from Stockwell, which is just outside the door, gets you to the West End/Oxford Street in 10-20 minutes. This has the downside of constant Tube noise as the house is almost directly above two 24-hour Tube lines (Northern and Victoria), as well as the noise from the shops and Sainsbury's nearby. However for London standards such a noise level is not bad.
From the outside the place is definitely ugly - the entrance is through a service alley whose security door is broken, but once inside the place is unremarkable.
There's no desk and the WiFi is reliably slow, so definitely not good if you're looking to work from there. Refrigerator, sofa, and a small armoire with a decent amount of clothes storage are nice amenities. The room has a large window facing out onto this alley: however it does not open onto the outside but rather onto a small porch.
The host speaks Spanish and Romanian and is very friendly if you have any questions. There is pretty detailed check-in instructions so you won't get lost!