Incredibly convenient location, and Diogo is a wonderfully welcoming host.
His place is only about a ten-minute walk from Victoria station (helpful for exploring or using the express train to Gatwick Airport), and attractions such as Buckingham Palace are very walkable without needing to use transit.
If you're hungry or coming in at odd hours, Diogo has a well-stocked pantry of instant noodles, treats, and even Monster energy drinks.
The room itself is very basic and no-frills. There's a small desk/chair, a bed, lights, a bathroom, and WiFi. The bed frame is quite squeaky, and I woke myself frequently whenever I changed positions. The room felt a little insecure since the lock is broken, and the door tends to crack open. Hopefully that'll be fixed soon.
Ultimately, this was perfect for my short solo stay while passing though London and trying to minimize expenses.