We've used this lock for some time now but have finally moved on to a different product. As much as we love the concept, the implementation of the product is poor. Specifically, the lock adapter that goes onto your existing deadbolt often "pops off" off. This would then cause the lock to be unusable, both to physically turn it or use the app. I often had to take it off, readjust the adapter, and then place the device back on. It has gotten to the point where it is nearly unusable.