We stayed one night at the cottage after hiking around Mt. Cook. The views from the deck are absolutely stunning. The place was clean and comfortable. It’s only about 20 minutes outside of Twizel which was convenient for us as well. I didn’t meet Sonja in person, but she was responsive and helpful. The only issue we had was a lot of little bugs got in through the window screens. Sonja had left a note explaining to close the windows or turn out the lights (so bugs weren’t attracted) but we didn’t see this until many of them were already inside. If you keep the lights off once it gets dark or windows closed, then you should be fine.