started out good, but failed
I've had two of these. Started out great, but within a year, went haywire opening/closing of it's own accord with no cats near it! Manufacturer replaced as still within 3 year warranty, but the replacement they sent me has the same fault 2.8 years later! Now impossible to use as it keeps either locking them in or out, the display is broken and I've tried resetting and new batteries to no avail. Manufacturer refuses to replace the second unit.