I think the low temp was on the users error, not the t-stat. I have Hydrofarms too and they have worked for a year fine. I only use them as backup though. The only real downside I see to them is they fail open. But for $35, hard to beat the price. With that said though, I only use Herpstats as my main t-stats. Have 2 Herpstats 1 and 2 redlines and 2 Herpstat 1 and 2 normal.