One issue that I have with the XTS, is the card placement. If you leave a spot open, between a digital and sli card for expansion in the future. The card you put in the open spot, pulls the ext#'s from the sli card to the right. Also, the ability to program through a computer, is comberson. It isn't real time programming. You download the database, make your changes and upload the new database. If there is any corruption or interruption on the upload, you are hose. The phones are good. But from a tech stand point, I wish the information on features and programming were better documentated. Any time I call tech support, I learn another trick or piece of information, that isn't in the book.