The older DW4000 system uses two modems hooked together and the new DW6000 has only one that does both jobs. They are both or DW6000 hooked to one dish and you can also have DirectTV on the same dish. So one dish can do all satellite internet connections and TV too. We had a small alignment problem after installing a new roof but were able to realign ourselves. There is a diagnostics program that you run to get the best alignment. It takes two people but can be done fairly simply. We have never had a technician since the original install. Occasionally a power outage or lighning storm will put so much static elictricity in the system that you have to shut down and go through a procedure to eliminate that problem. That only happened once though. I have never lived where I could get cable or DSL so I can't compare but next to a rural land line there is absolutely no comparison.