We stayed at Liz's place for a week.
1)Location, it's literally 5 minutes walk from a tube stop, and then a 15 minute tube ride into the town. The neighborhood was good, plenty of restaurants, and a big supermarket around the corner from the tube.
2) Apartment, the house is located in a quiet neighborhood, so you will get a good night sleep (the bed was comfortable too). The suite though is very small, especially the shower and the bathroom sink, ideal for one person in my opinion, but a couple could get by as well. The room had an old style stove (hot-plates) which we didnt really use, a low-power microwave oven, which we did use and a mini-fridge, which also we used.
3)Host: Liz was a great host, she was very responsive, but gave us privacy at the same time. She was eager to help and resolve any issues. She is also a fabulous piano player, btw.