Well number 51 will reply but I won't be any help. I installed Directv myself. And I rate myself with a Triple A service.
However, I have had Dish installed which is sometimes the same type of qualified work. Depends on how they are paid. Per hour work is generally better. Paid per home hookup is usually sloppy. I had to have Dish come 2 times. Once for the sloppy hookup then the next time to fix the sloppy setup. Ask if they get paid by the hour before you allow them to install your system.