We had a great stay! A good place for our family of four and the views are incredible!
The information is very accurate and Daniel always responded very quickly.
We arrived by train at St. Pancras and two short tube rides later took the C10 bus from the Canada Water station to the apartment. Very convenient: there's a bus every 10 minutes or so and and the ride only takes less than 15 minutes.
There's a grocery store very close to the Canada Water station.
Not all the windows have curtains so you may need a sleeping mask. No need for ear plugs, though: the apartment is quiet. It's in a residential area. Planes approaching Heathrow fly overhead, but still so high up that the noise is very faint.
The Doubletree Docklands Pier is right next door so on one day we bought Thames Clippers "River Roamer" tickets (which give all-day access to the river buses). There's a little ferry which goes straight across the river to Canary Wharf Pier and from there you have access to all the river bus routes. We took a river bus to Greenwich and later from there to the Embankment. The river buses run till late so after dinner&theater we took one back. It's great to see the city from the river.
On our first night we had dinner at the Blacksmiths Arms pub just down the street (past the Doubletree hotel): good food and friendly service.