Cannot fault this product in anyway. I needed an alarm fitted, but had quotes and was just to expensive, so I had to look for a diy product. Looked at lots but this was the only wireless system that I could find that also has a wireless solar siren, most wireless systems have a wired siren. Installation was very easy, I had one issue but there is a helpline number which answered immeadiately and my question answered. Basically, plug the control panel in, then get it to learn about the remote fob, each pir and each door sensor, put them on the walls and doors, then get it to find the wireless siren, mount wireless siren (do need long ladders for this obviously, only midly tricky bit, but comes with mounting template) then program the zones, thats it, half a day max I would say, even if diy challenged like I am, another plus point is the system is easily expandable, add another remote, another sensor etc, top notch.