I have the first 922 installed in my area. Sling was very inconsistent in the beginning, many say it still is, mine works well on my iPhone, my iMac and on my wife's PC and Power Book. Regardless Sling was clearly not ready for the consumer in the early stages.
TV2 was not available for quite a while, it is now.
The guide was ill fitting to TV screens, they fixed that...at least for me it worked.
Caller ID was spotty at first, it seems more stable now.
The "Extender" never materialized...
No BlockBuster yet either.........and these are issues I can remember.
I think the main gripe is the cost when you strip away the hyperboles, and with todays economy it is understandable.
Then there are those here and elsewhere who simply hate the whole idea of the 922. They feel it's promise never materialized as advertised and perhaps they have a point.
Personally I prefer it to the 722K though, which I have also, but I like new equipment warts and all. For me the 722K is just a hotrod 622 which I also had, it had issues too. I suppose the point is technology is not perfect, you pay to play....or not.
I've had mine since 04/15/10