We have multiple of these locks in our office. I had 2 of them stop actuating the lock mechanism (so it would tell you locked or unlocked, but it didn't do anything.) I emailed with harfoseller (sent a video at their request) and they promptly sent 2 replacements. The new locks worked great (of course the old ones did too until they quit).So, why not a 5: You can't export or download from one lock to the next so in an office environment, every person has to touch every lock. Also, the finger priSee full review