Firstly, as Andrew says, if you're allergic to or don't like cats this is not the place for you. Tiger and Esme are the beautiful felines who graciously allow you to share their home!
That said, Andrew (and the cats!) gave me a warm welcome and I got a full tour of the house, with an explanation of how everything worked (Wifi, TV, Netflix etc). It's homely and well-equipped.
I particularly loved the area and the location of the house. It's quiet and feels safe and is within walking distance of Greenwich Park. The railway into London is about a mile away, but there are regular buses to North Greenwich Tube near the O2. It's ideal for the Marathon - the 1 mile mark is just round the corner and at the end of the road.
I'm definitely hoping to stay there again