We programed our prints in a few different positions to ensure easy access ( we did not test it without doing that first). It opened every time and in about one and a half seconds. You have to press a button beside the print scanner before placing you finger on the scanner (this is included in the 1 1/2 sec opening time).The button makes an audible "beep" and so does the scanner once it has scanned your finger. We tried opening it with our un-scanned finger prints as well as with some other family members' unscanned prints and there was no false positive scans (it did not open for any unscanned prints). Great size for our needs. Can fit under a bed. Seems pretty sturdy although I'm not going to try to smash it against the ground. I would recommend this product.
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