We just got setup again with DirecTV yesturday. We had 2 visits, both done through Premier Communications.
Install guy #1 calls no line of site on roof. Ok, I get that. Then huffs around for an hour and says if I have a shovel we can do a pole install, very much implying I will be helping on the endevour. Or he can "sell" me his bags of quickcrete, pole, etc for "cost". I talk to DirecTV and find out I dont pay a dime as long as they call no line of site. So that was a little shady. I needed to get permission to do the pole install so that install was cancelled. I set back up for this past Saturday. Totally different guy came out, Premier has many sub-contractors, and spends 5+ hours doing the pole install and everything else. I was quite pleased with his work. Gave him a $25 tip for all the troubles.
The difference between installer A and installer B was night and day. Just like anything else it will be a crap shoot.
Also note the # they call you from to let you know when the tech is coming will NOT work for reaching them yourself. What a nightmare that was. Had to call D* each time I wanted to get to Premire.