A: Sadly, we don't all use it and I come in, turn it on, set the heat manually to the temp. I want and then turn it off when I'm done. Easy peasy. I have noticed that the time returns to the correct time, so that's encouraging from your question, though I don't generally pay attention to or use it for the time. It does require a dedicated line to your electrical box. Bottom line, it has been a great addition to our usually cold bathroom.
A: Most of the time the power comes back on and it resumes operation according to its schedule. This isnt always true. i've had to reset it after some power outages. I dont know why sometimes it does and sometimes it doesnt. This is a fancy unit and I like it but it is not standing the test of time as i hoped it would. The LCD has blank spots and the remote is toast. i've had it a few years now. If i could go back i would have got one with a dial. Its nothing to go flip it on when you want and turn it off when you're done and leave for work.
A: Its plastic.
A: The grill on this unit is plastic.
A: It is plastic. Had heater for several years. It still "works" but the lcd is missing spots and does not fully light up anymore. The remote has long stopped working. I would not purchase this again, I would go for the cheaper analog model. When this fully dies it will be a pain because im sure the analog models require a smaller hole in the wall.