I beg to differ. I've used one for 2 years. It's not a ranco but for 2 tanks with the same size UTH, it works just fine.
Yea I mean it's not GREAT. It's no herpstat or anything. But it's a decent on/off thermostat that keeps temps in my quarantine tubs just fine.
Ok I would rather have a "piece of junk" than nothing at all or a light dimmer.