The LCP500-L security system has lots of features and is easy to use. I had an older Vista Lynx and was able to upgrade to the Lyric without any problems. I was able to reuse the existing 5800 sensors and programmed them into the system which was one of the main reasons I chose the Lyric. Definitely a plus if you already invested in a bunch of the older sensors/accessories. However, at a minimum, a monthly service is needed in order to get email/SMS notifications (hence minus a star). A nice looking product that is well built as well as functional.