A friend of mine and I rented Graeme's house for 3 weeks in February. It was a gem. The house is beautifully situated (only a 25 min. walk from centre of Nelson) but in a very quiet neighbourhood.
When he is not renting it, it is Graeme's home so he leaves it completely stocked (right down to hot cross buns and beer in the fridge) and tells his guests to help themselves to anything they want to use. His only request is that if something runs low you replace it. It was wonderful having a fully stocked kitchen.
The house comes with a cat so it would not be suitable for someone with cat allergies, but Abbey is a sweet, lovable cat who is very easy to look after.
If you are looking for a house in Nelson, I doubt you could do better.