Absolutely terrible, multiple electrical issues since installed. The customer service reps have outright lied changing what they claim countdown timers are. I received a lockout for "missing a sample" when I called back to dispute it, the second man stated two different times stamps than the first man...the second being longer than 5mins so the lockout was "valid" The first guy told me the gap or requesting & my providing was only 2mins and insisted the countdown timer was always two mins, when in fact it has always been 5mins for the whole year I've had the device.