E-mailed the X10 about my SC12A about old door sensors coupled with the latest stuff, Eric Boyd, reps name, returned my e-mail and said will replace them with the new door sensors as soon as they are available....... I consider it a great service and understanding. So it's not that bad as it seems sometimes. So far I am happy with the SC12A.... responds to all commands, the range seems pretty large, the new motion sensors work great (the only prob is when the old ones, (10) are used, takes a long time to communicate with the console and the distance they start working is much less than the new ones. So, not really going into tech details(not a pro myself), so far ir works great.... now for a week, the night time Home Mode hasn';t given any probs, when tripped, it calls my cell, I can activate(deactivate) with my cell... so the only thing it's missing is smoke and fire detectors? Any ideas here.. also, water leek detector would be a great stuff to add(my heating is hot water based , as well as the city main should have been put under control) I love those nice blue boxes the x10 stuff comes in!!