Has anyone tried the red-light/ green-light alarm clock for their toddler and they followed it?

My daughter is almost 5 and started using it at 18m when she went into a big kid bed. Has worked amazing bc little kids can’t tell time and need some way to know when they can get up and the visual of the ready to wake clocks are key. We use the Mella clock, you can find it on amazon.

The idea of it never sat right with me, I would hate my child to think they couldn’t come and get me if they needed or wanted me because the clock said no.