Is HKC a decent quality alarm? Ive vaguely heard of the likes of Scantronic, Honeywell, Visonic...
The keypad looks like my son has made it (http://www.hkcsecurity.com/uk/product/rf-remote-keypad/uk-key-pads/#.WfBUgmhSy00), are they generally interchangable, i.e. can i swap it out for a more...