Product review (5 stars): Works well with fresh batteries, have used for a few weeks, still working well.
Batteries that came with it were old, so it wasn't accurate when I first set it up.
I replaced the batteries with some fresh ones and it became very accurate, I compared it to some other good digital thermostats in the house and it matched them all.
Memory function keeps track of "Hi Lo" stats, you can reset the memory by holding the button on the back for a few secs.