This is a Summer stay review.
The Highlights:
If you like solitude, stay here instead of staying in Tekapo!
Absolutely fantastic place.
Perfect for night sky photography.
If you're lucky you might get to see a hedgehog.
The sunsets and sunrises are ridiculously gorgeous.
Good hiking opportunities in the area (that are not yet mapped out!)
The cabin is secluded. While you can see neighbors you mostly can't hear them.
Incredibly well stocked kitchen.
Good bedroom for sleeping.
Wonderful shower.
Great couch for reading.
No A/C, but we were able to keep it mostly cool by keeping the windows open. However, there were a couple times when we were baking a bit. Note, people in NZ continue to not put screens on their windows so it's either windows closed and melt or windows open and be bugged by sandflies, flies, and moths.
For a much more detailed review I have it posted on TheHikingBookworms.