within 1 week of instalation ,the front door mechanism started playing up,it was very hard to lift the handle to double lock the door. Sent emails which they never responded to.Weeks later a lady phoned and said we can send a engineer tomorrow, between 8.00am-6pm, i agreed but asked them to call 30mins before they arrived so i didnt have to take a whole day off,which the engineer did. on arrival i showed him the problem, and he fiddled around with the door for 10-15 mins and said it was now ok, it wasnt,as when you close the door now ,it rattles unless you lift the hadle to engage the second lock mechanism,which now feels "graunchy, like metal on metal. Worse still , my wife later discovered that you can just lift the outside handle and the door opens,so unless we lock it with a key anybody can just walk in off the street. emailed their emergency email address 5 days ago.....still no reply.