I stayed in the Annexe for several weeks. Heather and Duncan were truly wonderful hosts. They have clearly put a lot of work into making the Annexe a cozy, comfortable place to stay. It is just as cute as described, with a well-equipped kitchen and lots of extra touches to make the place feel like home for an extended stay. The neighborhood is a quiet, residential area, but just a few blocks to cute shops and restaurants on Oxford street, as well as plenty of buses for easy transport.
There was a pest control issue at the end of my stay-- no fault of my hosts', the unit was very clean and well maintained, these things can just happen in big buildings. Heather was very responsive to the issue and took immediate steps to resolve it.
Overall, you couldn't find a cozier place with nicer, more attentive hosts.