Our stay at Fernando was very good. The place is somewhat unconventional, but it has a lot of character and grows on you each day. The location was really good, especially if you are flying in at Stansted. It's equally good for getting in the city center and also close to a supermarket, if you planning to to some groceries. Even if the apartment is in an old industrial area, we felt very safe, even coming in late at night. The underground/train station is only 5-6 mins away.
Check-in and overall communication was also really good and Fernando gave us some very good tips about nice places to eat and the surrounding areas.
For those worrying about the infamous London cold weather, the sleeping place could be heated up quite nicely, so that made for a good night's sleep.
One thing to mention is that the workshop located it the middle of the living space is a woodworking shop. This gives the place a very unique feeling, but also quite a bit of sawdust. Also, some people might not find the air mattress acting as a second bed very comfortable.
Overall, I think Fernando's place is what Airbnb used to be about: being able to share somebody else's home. And this home has something really unique, which made our stay in London juts a bit more interesting.
We would love to stay at Fernando's again for our next trip to London.