We had a brief but great stay at Jonny and Tanya's cottage. The location is fantastic, a short stroll to the Church of the Good Shepherd, and also a short stroll into town over the new-ish footbridge.
The cottage is really cozy, with comfortable beds and a great little outdoor space. It's well set up for Tekapo's cold nights with a heat pump, heated bathroom floors, and electric blankets (if needed).
Jonny and Tanya were super communicative, and Jonny was quickly on the spot when we had an issue with the lockbox during our stay.
Thoroughly recommended.