Loved our short stay at Kate's. It's a quick walk up the road to late night drinks, awesome breakfast and other shops (newsagent, etc.). The place was sparkling clean with a very comfy bed. Electric blanket and heater was a real winner as it was pretty chilly when we were in Auckland.
Getting around is very easy by car as Grey Lynn isn't far from the city to its east or the wine region to the West of Auckland. Though we didn't use it, Kate helpfully provides a bus pass should you need it.
Totally recommended!