We were a family of 7 adults and 1 child and the house worked really well for us. The access to the decking is great and it is totally safe for toddlers.
We loved watching the planes taking off and landing at Nelson airport. The other big bonus is that you are totally private. No neighbours look into the property and the view makes you feel like you are in the wilderness.
You do need a car however as it is quite a steep 10 minute drive from town.
We loved our stay and would visit again.