I have had mine for a long time, 3 years maybe?
Everything is on the screen, no need for a lot of button pushing.
The button flips between time and ODO on mine. The computer slides back easily and you just push the button. It's easy.
It does what I want it to do, and it doesn't do what I don't want it to. My favorite bit is that it starts automatically. More computers have auto on now, it was one of the first.