I stayed with Matthew for a weekend. The house is very nice and easy to find from the Oval Tube Station, not even a 5 min walk.
Matthew was very welcoming and explained a a little about the area and where to eat and drink...I can recommend Henris, they do a full English breakfast there, and the Fentimans Arms. Both very near and good!
I didn't see much of him at the weekend, but that was also due to the fact that I was out most of the time! He was also very nice about my chekc out time, I could leave whenever I wanted!

The room is nice and spacious, tiny toilet and little shower...but all very clean and adequate!

I also left a beer in the Drinks fridge, yes there is a fridge for drinks only!

All in all, I recommend staying with Matthew if you are not to keen to be in a touristy area...Lambeth is quite laid back and a little off the trodden trail, but close enough to reach anything central within 20 min.