Very solid place to stay in a great London neighborhood -- groceries are a block away, and there are some great Georgian and Ethiopian restaurants nearby, and more stuff at Granary Square, 4-5 blocks away. Kings Cross is about a 15-minute walk.
Basement apartment is "London-sized", but it's super-clean, and has everything you need. Just be aware that you might hear some footsteps from upstairs. Good choice if you want easy access to the heart of London.