4. On occasion the HR 20 will shutdown a tuner without warning. Programs won't record and even their system test will not report the problem.
I'm not crazy!!
(Well, at least there's evidence I didn't imagine this HR20 problem. )
Some time back I reported this. My report was met with the following response from others on this board: <crickets chirping>
Both tuners appear to be working and both show excellent signal strengths, but the HR20 will simply refuse to USE one of them. A soft reboot will clear the problem.
When the HR20 enters this "mode", the section on the info page about tuners will read something like this (going by memory, I'm at work and away from my HR20):
SAT Tuner 1: MPEG2, MPEG4, Record
SAT Tuner 2: MPEG2, MPEG4,
ATSC Tuner 1: Record
ATSC Tuner 2: Record
Note the lack of the word "record" at the end of the line about the second tuner. When the HR20 is working properly, it will have the word "record" at the end of each line.
To comment on the OP's other complaints:
Recently' the HR10 (older TiVo based unit) has become less stable. The last few firmware updates, combined with some additional data in the satellite stream has destabilized it. Some examples include missed recordings with a bogus "someone in your household modified the season pass" reason for the missed recording and the occasional outright lockup.
So, in light of the recent destabilization of the HR10, I find the HR20 to be at least as reliable, perhaps a bit more so. In fact, the more I've been using my HR20, the more I've been growing to like it.