First of all, I'm basing this on my experience with a slightly different model that Woot sold a while back, so take this with a pretty big cuboid of salt.
These are pretty easy to set up, you just plug in a leftover hard drive and a leftover monitor. Mine would talk to either a VGA or a composite monitor, but be careful you don't switch the UI to the monitor you don't have.
The cables are not well shielded, and unshortenable, so there's plenty of interference and loss. Although the cameras are weathertight, the connectors are a bit less so.
The cameras are actually pretty good! If nothing else, they have much better iris control than others I've used.
The video looks ok on the screen, but their format is a raw H.264 that no other player on earth can read directly once you export it. Youtube sometimes works with some pretty harsh i-frames, while the dump from the other camera didn't convert at all.
Similarly, VLC can play them, but you have to pass in --demux h264 on the command line, which is painful on a Windows box.
Their online apps depend on this device supporting a standard security camera protocol. The apps are all kinds of sketchy, in my humble opinion. Also, keep in mind that remote access depends on being able to reach your network remotely. For one thing, you're going to need some way to figure out your IP address, on most consumer internet connections.
Spiders seem to love the IR light, and spider webs moving in the wind set off motion detection.
By the way, doing motion detection on outdoor shots is a giant pain in the rump, especially if you live somewhere with trees and sunlight.
In short? They're not really good. You can do MUCH better with a dedicated linux box, ZoneMinder, and a cheap Chinese capture card. But then you'll have to learn Linux and PC Hardware. I replaced my ZoneMinder system with one of these, because I just couldn't spend any more time futzing with it.
Lastly, if you're really talking about security, keep in mind that in all reality, if it does manage to take pictures of thieves, they're probably not going to be identifiable from the video. Also, if someone breaks into your house, the device is conveniently small enough to steal, too.