Easy to set up and easy for my three year old to understand the colour change. I have to bribe him to wait until it goes green, but he now sleeps/keeps quiet until 7 whereas we we're bring woken between 5 and 6.30. There's scope to teach him the time too when he's a bit older.
This product is easy to assemble and use. The straps are easy to attach to a chair and the leg extensions easy to alter. The table moves for easy access, although the cup holder is for standard cup my childs sippey cups dont fit. I prefer to use without the table pushed up against the dinner table so my son can eat with us.