Revising my previous rating as the reply is woeful. The software, this app, is so slow to open and show the doorbell camera that it renders the nest doorbell useless as a remote doorbell as you can never respond before a delivery driver leaves. They're there for thirty seconds... end to end latency of notification > open app > get video and be able to talk is closer to a minute. My home internet is a reliable and constantly monitored 1Gbps. My mobile reception is great. The problem is this app.