It is rather better than my homemade one from 1982
https://twitter.com/njcw/status/1368566103933337603
My dad gave me a old keyboard from something and I traced the zx81 PCB to discover how it was wired, then rewired the new keyboard the same.
I connected it by burning a hole in the case with my soldering iron to poke the wires through!
It was a dream compared to the membrane keyboard.