We had this (thankfully an optional addition to physical keys) at one of my previous buildings. The failure rate was maybe 2% but still way too high to trust fo

We had this (thankfully an optional addition to physical keys) at one of my previous buildings. The failure rate was maybe 2% but still way too high to trust for regular use. The locks also ran on batteries, which a technician came out multiple times in the ~year I lived there to replace. Overall was a nice add-on to the physical key for e.g. guest access but the economics of these things given the battery replacement seems dubious. If it ain't broke...