Our family (with two kids: 7 and 2 year old) had a lovely 9 day stay here. Lots of peace and quiet (apart from our toddler). We enjoyed the beautiful aspect and exploring the property and making forays to the river. We got quite used to the 20 minute drive to Motueka, preferring this rural setting to being bustled up with others near the coast.
I also caught a 4/5 (PB) pound brown trout in the river which made the trip even sweeter.
There is a good lawn for playing on for the kids, we found a rogue soccer ball hanging around which was used quite a bit, while we were there ( bringing a ball or cricket set might be useful).