I really enjoyed my stay at Alessio's flat; it has a very cool, modern asthetic and a pretty nice view from the balcony. It's also just a short walk (~5 minutes) to both the Westferry tube station & some convenient shops by the canal, or just a few minutes further to restaurants down in Canary Wharf. From Westferry, it's about a 10 minute train ride to the city center.
Alessio was a great host as well. He was very friendly and gave me several suggestions of places I should make sure to check out while I was in London. I would definitely recommend staying at Alessio's place to any of my friends. I had a really good time in London, but left feeling like there was still so much more to do and see.