A really fantastic spot to stay in! Johnny has a really lovely place here, it's well laid-out, well decorated and spacious yet cosy. We stayed as two couples and a single, and found that we all had more than enough space to hang out and relax. The ducted heating meant it was easy to stay toasty (even in the usual Wellington deluge!), and I think the doors in the kitchen would mean it was also a lovely place to stay in the summer. Worth noting that the bathroom has a shower as well as a bath (I may have missed it, but couldn't see this in the photos/description) which made it very convenient to get all 5 of us up and ready in good time!
The place is an easy Uber ride or drive into the city, but also really well-appointed for enjoying the cool spots in Hataitai (we'd recommend the Waitoa Social Club for beers and BambuchiSan for dinner) and gives easy access to the Miramar Peninsula, which is scenic and lovely. The area around the house was very quiet and laid-back, with a small parking spot out front (we managed to squeeze a station wagon in pretty easily) and easy-to-find on street parking, too; we had 2 cars between us and didn't struggle to get a car park.
The only thing possibly worth baring in mind is if you have animal allergies. Johnny's family have a dog (a darned cute one if the photo on the mantle is anything to go by!) This, of course, means there is a bit of animal dander around. Not an issue for most, I'm sure, but something to consider if you do have severe allergies.
Overall, a really lovely place that I'd definitely return to!