At a budget rate, this is a great Airbnb for exploring Coromandel, Cathedral Cove and Hot Water Beach. Whitianga is a little drive away from the major sights, but you'll still have access to a nice little town (<10mins away) with restaurants and convenience stores. The rental itself is in a nice and quiet neighborhood. I crossed paths with the owners upon arrive - as well as their dog - and they were very friendly.
It's stated in the listing, but keep in mind that the studio shares a wall with the rest of the house, so I could at times here the owners watching TV or moving about. Vice versa, I assume they can hear noise and movement in the studio. As a solo traveler, this didn't bother me. The water pressure in the shower and sink is very strong and the water gets hot very quickly. The bed was very comfortable and the curtains really blocked out light to aid deep sleep. Overall, I recommend and would stay again!