I've installed this system in several homes with good results and satisfied customers. The Panasonic KX-TA824 control panel with 3 desk phones included usually costs between $550 and $600 and you can purchase additional phones seperately. It is fairly easy to configure and has many options. You can designate which outside lines ring on which phones. It has built in intercom features for talking between house phones. You add a voice mail card for built in voice mailbox capability or it is compatible with CO provided voicemail. You can designate night, day and luch modes. Automatic call forwarding, call conferencing, page and pick-up, hold music or message. It takes a little time but its not too hard to configure.