Exactly as advertised: a simple, small, clean place to stay in a gorgeous location.
Any problems are surmountable. But so you know: as of November 2022, this is in an obviously new neighborhood that is under construction as more more is being built in the Lake Tikapo area. There was not a lot of noise from the building. It is a short drive (or a medium walk) into town. There are lake and mountain views, although the big windows face neither.
As to the lock: the instructions are correct, but could use editing to make them clearer. I had never encountered this system, where you palm the pad, then enter two (random) numbers that appear on the pad, and THEN enter the code you are given. Just be patient, and plan your movements so you don't have to go in and out very much!