Bests & Worsts Reviews from Amazon

App doesn't explain what "sensitivity" means - is 1 "most sensitive" or "least sensitive"? You'll have to Google it to find out! But it doesn't really matter what setting you use - I have one camera pointed right up my front walkway, and every bug in a five mile radius will set it off at night, but I've had multiple FedEx, UPS and USPS deliveries during the day and Blink didn't capture anything at all. In fact, the reason I'm finally writing this I just went out a walk a half hour ago, and Blink didn't capture my coming or going at all. GREAT! Also - and this is inexcusable - the app doesn't allow for multiple users. If you want your spouse or child to have access to the cameras\app, you have to give them your login info. Or maybe you want someone like a babysitter or housesitter to have "read-only" access to the app? Nope. It's give someone total administrator rights, or nothing at all. To make matters worse, I've read several cases of couples sharing logins but only one person getting notifications. This was my first foray into "home security" type stuff, and honestly it was a waste of $100.