We had a lovely stay with Katie and Simon. Katie was very friendly, we didn't meet Simon. Our stay was short, and we were visiting London so we weren't about much. However...
The room was amazing, as was the bathroom! Do take K&S up on their great tips for going out, dining out and sights to be seen... we did and had some great experiences. Katie even called to hear after reservations!
The only downside was the street noise... the neighborhood was a little unkept, but there were some gems to be found, including a coffee shop at the entrance of the Underground about a 5min walk from K&S.
If you want hotel quality without giving out to many £££ this place lives up to its expectations! Great price/quality!