We loved our stay in Jazz and George's caravan. There are lots of touches that make the place cozy, comfortable and homely. We used all the facilities here and had no problems. The shower is surprisingly pleasant, really powerful, warm and well sheltered. The outdoor toilet is also ok and they've done really well to make it as nice as they have.
We ate there both nights, using the hobs and BBQ and had no issues at all but George was on hand to show us how to use all the appliances and offered to help if we needed it.
We would highly recommend staying here if you are going to Milford Sound or Te Anau. It's definitely going to be our most memorable stay not only because of the quirky caravan but because of the warm welcome we received.