Sonia's place is accurately described. A modern, clean and ergonomically designed place. She and Oscar are great hosts. The room itself was perfect for us (3 adults and a newborn). I loved how creative the living space and bedroom were designed especially how the windows let natural light inside the entire flat. Transportation isn't a problem as there's a bus stop just across it.
I would recommend anyone visiting London to stay at Sonia's. Truly a great value for money.