Been a Directv sub for 11 years, and one of the original HD DVR owners. Their flagship DVR has had some weird issues, but mine has worked fine since I got it, for the most part. Some of the issues, like blank recordings and voice sync issues, were very annoying, but they have finally seemed to be worked out, after numerous software updates.
But as far as rain fade, it's really a minimal disruption issue compared to the ridiculous outage issues we had with Comcrap, and we live in the Comcrap home office city. On balance, even though Directv has had some issues, it's better than cable. Also, they do have a networking capability with their DVR, but I never bothered to hook up to it. No need in my view, since I don't download movies or stuff like that. I use my PS3 for movie watching for the most part.