Martyn is a very welcoming host, his place is very cosy and comfortable, the sofa bed is surprisingly comfortable.
The Studio is located right next to a Turkish supermarket, a street market (Bazar) and 5 minutes walk from a small mall with a standard supermarket and a pound shop (all for one pound), so even if you forgot your toothbrush you'll be fine.
Martyn gave us good tips about London and helped us a lot.
We enjoyed very much our time in Martyn's place.