Couple of things first concerning my DSC keypads yes they are pricey but you get what you pay for this keypad is their top of the line and it responds to everything including programming in English so no cryptic codes, so if the back door is open it says Kitchen Door Open or Battery In Master Bedroom Motion Detector Is Low for example.
Also I'm now starting to think that x10 has also taken care of the "Zone Sticking" problem since I've been testing my friends setup I haven't had one zone stick! and I once again have tried to do this with no luck. This used to really be a problem that annoyed me to no end. The motion and window door sensors used to have have to report back to the console twice to complete it's communication. I always thought the solution for this problem would be a small buffer so if two devices were trying to report in at the same time they could just be stored in the buffer until the unit had a chance to process them. x10 has obviously changed the design of the new console because you used to be able to see the zone that was violated blink on and off on the new console this has apparently been dropped and now it's just the window door sensors notify you when a zone is open, while in the run 2 mode.
Tom j.