How big of a concern is that, really?The one thing I don't like how you can't have the H/HR equipment hooked up to the HS-17. If the HS-17 breaks you are screwed and can't watch TV until they ship you another one. Unless they will have plenty of these on hand and then they could ship you one the next day. Even on the weekends.
The LNB is also a single point of failure, and that is exposed to wide temperature swings and everything else associated with being out in the elements.
If you have an Apple TV / Amazon Fire TV / Roku box you can watch live TV streams through a number of the channel-specific apps (HGTV, FOX Sports Go, NBC Sports, etc) that could also cover you in a pinch if any element of your satellite service is interrupted.