Anyone have any experience with the Chuango wireless alarms?

Im looking for an easy to DIY wireless solution and these things look easy to install, the app and sms notifications look good. NFC tags are a plus.

I know there are other brands like Paradox which will work well but this looks like no mess no fuss.

Link to product below:

http://www.chuango.com/english/conte...assid=17&id=70