We dealt with this company as part of the agreement with the builder we bought a new home from. Overall we were very happy, with a few low points.
As far as the tv, phone and central vac, we dealt with Mary and she was fantastic. Very personable, easy to talk to, knowledgable and understanding to our needs and finances. She worked with us, to try to make for a great experience and for us to walk away happy.
The prices were average to good on the products we bought, and when we took into consideration it would be completed for when we moved in, it seemed worth it.
The only problems we had were with the customer service for the alarm. It was difficult to get a good response, and once when speaking with them, it seemed as if they were not concerned about helping and making us happy. Further down the road, after speaking with them in person, everything finally got resolved, but it wasn't a great experience prior to that.