First time I hear about this device. I learned to program 25 years ago on a PC-1500. I wish it had multiple lines like this machine !

The bane of the single line display! It's amazing what constraints like that can do to your imagination and skills, though. You have to be very clever.

I programmed all day at school for years on the Casio version:

https://www.vintage-calculators.nl/page89.html