I had my install yestreday and the guys did a great job. They came in a DirecTV van, and had DirecTV photo IDs clipped to their DirecTV shirts. They mounted the 5LNB dish on the edge of my roof and the guy was able to hit the roof joists with all 6 bolts. It is very solid. Althought he recommended a pole mount, he said that this was the best roof mount he had ever done. He said my house is very well built ;-).
The signal strength on my old SD recievers and the new HD DVR are actually higher than they were with my old dual LNB dish. There I had low 90s and now I have high 90s on 101, 110 and 119. The H20 box reads lower (as we know it should) on these but the 103 numbers are consistent. The 99 sat is not getting any signal and the installer said hopefully when D* turns it on the dish will do fine but it may need to be re-peaked.
So in the end I got 5LNB dish, H20, HD DVR, new multiswitch, 4 months HD programming, and a professional competent install team totally free.
I'm a happy D* Customer.