The programming is a bit fiddly.
In the case of my grandmother should Mon - Fri the same up and down times are programmed and Saturday and Sunday each other periods.
Fr. are therefore needed every day then entered manually (the time can be just about "high" and "down" set, which means you have to press forever ....) and Saturday and Sunday also again - Mon , I find awkward! If you Mon - Sun wants the same switching time (what my grandmother did not want to) it is much easier, because then only one must set the times.
In addition, the characters on the display even for me are very difficult to read, especially the weekdays and the programming character - and that, although my eyes are very good. My grandmother can see nothing except the time!
That's why 2 * deduction.
Three star's for easy installation, low cost, and the function (when once everything is set up)