I know, I don't live too far from you, this winter was hard!ABSOLUTELY Perfectly!!!!!!!
We are in Michigan just 4 miles from Lake Michigan. It was below zero MANY nights and daytime highs hardly hit the teens for days at a time!
Heater and pump never failed!!!!!! Recently we had a day at about 40 degrees. I went out side just to check if the thermocube would turn off everything and it had!!!
This is the best winter time waterer in my opinion! I'll never use anything else!
By the way, we didn't have ANY heat in the coop either!!!!!