I would highly recommend staying at Valma's place if you are looking for an airbnb for one.
In terms of the actual place, it is very centrally located, and you can walk (~30min) to a variety of popular locations, such as the company gardens, harrington street, long street etc. You can also easily head over to devil's peak and hike.
In terms of amenities, it has most of what you would need, and the bed is also super comfy.
Finally, Valma is a great host and conversations with her were always interesting.