We LOVED staying at Sarahs property. The little annex is clean, stylish and very cozy. We booked very last minute due to family ill health, and Sarah responded quickly, and communicated promptly to allow us to access the property ASAP, which was hugely appreciated.
Location wise, it has direct links into the city, and being in a residential area very quiet. There is a shop a short walk away, and bus stops to the city.
It has all the cooking and washing amenities you need, and the bed is super comfy, plus off street parking.
I would definitely stay here again, next time in Christchurch