My partner, brother and I stayed at Peter's place for a couple of nights aftery brother arrived from a long haul flight from the UK. It was perfect for us, comfy beds, and nice bread and jam, milk and chocolate in the fridge for us which was great. Peter is really friendly and it was good to have a chit chat in the kitchen with him on one of the days.
Location wise it's closeish into town, down through central park. You need to be fit to walk up the hill through central park (very good excercise). I only did that once, and the other times we just walked into town down the hill (30 mins to the waterfront, more if you stop to play on the zip lines in the park!) then taxied back as there were three of us and it was only $10 for an Uber. There are public transport options as well.
Overall recommend as an inexpensive place to base yourself in Wellington. Thanks Peter!