Product review (2 stars): Not calibrated correctly
I used this for about 3 weeks and found that I had to adjust it to 26 to keep my freezer at 32 degrees. Since the calibration appeared to be off I sent it back and am getting the digital controller. The copper wire sensor on this one also seems like it could break eventually if it is moved around. The digital controller appears to have a sturdier sensor. I'll find out.