We bought the Kēvo 1 st generation about 9 months ago and had some problems with it loosing connection with our iPhones. I would reset them and things would go fine for a while until it wouldn’t work at all. I finally decided to call customer support and the person was very helpful and did his best to guide me through the steps of reprogramming. I did what he said, but the next day it still lost connection. I emailed with the support ticket that was created, and I was told I would be sent a new lock. I received the second generation Kevo, and after a little problem with getting it to accept a Key by email, it works wonderfully and is very responsive. I really appreciate the company honoring their warranty. Love this new lock!