we were 2 couples staying at the apt. The apt was clean and tidy, well equipped (they even had an AC adapter!). clean linens and towels and basic kitchen. the location was really great, lot of bus stops and 10-12 min walk to tube (event though we hardly used it, buses were much easier).
Apt has one big bedroom and a small study. The study has a pull-up sofa bed which is pretty small so I wouldn't recommend it for a couple. It was a bit too cozy. will probably be perfect for a family. Also living room has two more futons though can be a bit small for more then 4 people.
Charles and Bella were Great! they answered and helped everything we asked and all in all were very responsive. picking up keys (which for me was what I was most worried about) was easy and no trouble at all.
With all that said - We had a great experience, Charles and Bella are great hosts and the apt and location were perfect.