I read the thread about the IR543AH,and I am very interested in it. I'm waiting for a company in the U.S. to pick it up. If I have problems with it I don't want to have to deal with shipping it back to England. I've had a switchlinc controller go bad and that itself was a nightmare. I have to remove the switch, put in a plain switch, ship it back to smarthome and wait for them to fix it. I'll probably be without the switch for a month. It's unfortunate that Smarthome owns Switchlinc, and they won't just swap out the switch for a new one. Now I have to go into the box two times. I wish that they would bill my card for the replacement and credit the card when they get the bad switch back. Imagine how long it would take dealing with England