We spent a great weekend moored in Little Venice which proved to be a great location for exploring more of London, but also a good place to eat and drink. I would recommend "The Summerhouse", especially if you like seafood, and "The Quince Tree Café" (for breakfast) which is set in a hidden garden centre which provides a great setting. If you fancy exploring Camden Market then the nearby water taxi is a great way to get there (~50min trip).
The location was fairly crowded with boats, but it was remarkably peaceful and we didn't hear a sound from the other boats and slept well in the really comfy bed.
The narrow boat was as described and Sam was really helpful and replied promptly to all questions. We had everything we needed on board and Sam kindly provided milk, eggs, bread, butter and jam which was much appreciated.
A great weekend, would book again...