Is this a Good Thermostat to use?

[Strick]

Okay so, just to make sure I understand correctly...I get that the thermostat I mentioned is not the most accurate but do you mean that it's OK to use on a TANK and NOT a TUB or OK to use on a TUB and not a Glass TANK?

It's a good thermostat for what you want ot use it for. You can use it on tank or tub. I am running 3 of them now and they are within the +/- 2 degrees as advertised. You will have to find your set point depending on your setup.

It does not matter if one is using a $150 or a $30 thermostat there should be a backup system of some sort. Electronics no matter the cost can fail.