I recently bought the Arlo system. It's wireless, motion activated, and immediately uploads the footage to the cloud. Super easy to install and even change configuration on a whim. I really like that the recordings are uploaded immediately, so a burglar can't just steal the hard drive and take away the evidence. What I don't like, is that there is about a 1-2 second delay before recording starts, and that it only records for a pre-set period per activation. You can check the "library" of recordings from any device anywhere, as well as remotely view through any camera, live. Some folks won't like that the batteries have to be changed in each camera, but only about every 2-5 weeks, depending on how often the camera is activated, duration of recording, and the clarity settings on the camera. I don't mind the battery issue, in trade-off for the ease of install. I'd like to have a wired system that continually records multiple cameras, without relying on motion activation, but I don't want to give up the instant cloud backup. Not sure that there is a perfect solution, but this has been pretty good. I've been surprised about all the shenanigans that go on in the alley behind my house.