Colleen's is the perfect place to base your Auckland exploration at. It's near the bus stop and train station isn't too far either. You don't have to venture too far for some adventure as there are plenty of things to do within walking distance of the accommodation.
We stayed on 2 occasions and had no issues with check in/check out. Even though we came at ungodly hours. She was also kind enough to take care of our packs while we were away in Rarotonga.
PS. The bed is super comfortable so make sure you set your alarm if you have to wake up early.