Product review (5 stars): This Is The Heater You Want!
I tried another brand first because it was slightly cheaper, but that one burnt up within a few hours and stunk up the whole house.  I then ordered the Think Crucial heater and was a little nervous after the first disaster.  But there was nothing to worry about.  The Think Crucial heater installed easily and has been working now for a couple of months flawlessly.  The freezer temperatures are right where they should be (much better than they had been) and there was never any plastic smell from this heater.  Wish I had bought from Crucial in the first place!