Three of us spent lovely week at Costa's place. Location offers a tube station and few bus options. It's just on the side of touristy areas, which can still be reached easily. There're shops where you can stock your fridge 24/7, a park and even a church, if you feel adventurous or scared of vampires.
The flat itself is cosy, neat, comfortably organised. TV, wi-fi and iGadget dock station will keep you entertained. As the one who got the sofa-bed, I can say that it's perfectly comfy and easy to set up. There're also a couch, wardrobe and a bookcase by the opposite wall, not visible on photos but very handy.
Being a flight attendant and a generous soul, our host encouraged us to take full advantage of some dutyfree goodies lying around. So if you find youself in need of a sunscreen or a glass of Chardonnay in the middle of the night - make sure to check the drawers.
The only small issue we had was resolved in a matter of minutes, Costa and his friend Lily made sure everything's in order before leaving us to carry on with our day.
All in all, relaxed but efficient, great option for a long-ish stay.