So, I am one that has had SageTV running in the past with multiple HD300 extenders.
1. I ran the Linux version which was very stable and secure.
2.The HD300 units did an excellent job as an extender. Sage updated them frequently.
3. There is (still) an active community of folks that write "custom" skins, etc...
Since SageTV was purchased by Google, then left to die, I decided to get out and get back in with WMC. Before SageTV, I ran WMC with an XBOX as an extender as well as the Linksys DMA2100 units. In each case, I was always getting the "Network Error" issues and spent much time "tweaking" settings, changing NIC cards, etc... It just became too much of a pain and the WF was never really there.
Now, we have a new opportunity here with the Echo and while it is still far from perfect, I feel Ceton will get there. I agree with others that this was rushed to market and I think that was a mistake by Ceton. But as time has passed, improvements have come along and the system is much better. Perfect, no, but at least most of us can now watch "error" free TV.
In my case, I just want a rock solid DVR solution that requires minimal work. I think WMC 7 is an excellent product and it is really too bad that MS decided to let it go. Their mistake!
For the future, sounds like there are some cool things coming for the Echo, and I would like to see Ceton come up with their own DVR solution - like SageTV did. I doubt this would happen as their market would be small.... Most people are happy with their cabe DVR or their satellite DVR.
End of rant....