I purchased on the 16th July because I felt the system & range of equipment was good also I had a discount. My existing wired system was failing. Time to update to a wi-fi system with a phone App & remote control. The installation was not straight forward the wi-fi system is slow to react and is difficult to see what is happening with the sensor in real time. The tamper switch in each sensor was a problem and also the main panel tamper switch. They continually reported they were tampered witch became very frustrating after several attempts to fix the tamper the switch would disconnect from the main panel meaning you had to start re-allocation all over again. I had a particular problem releasing the door switch from the base just a screwdriver twist Ha, Ha. At this point I went on an 18 day holiday. On my return with help from the technical department & reading all the instruction notes the system was working and has remain so to date.