The HD Tivo has had and still does have some problems - mostly with HDMI port failure and some issues with Dolby Digital and certain receivers.
But - anyone that doesn't work for Dish Network, has used both the 921 and the HD Tivo and then says the 921 is more advanced is delirious!
The 921 doesn't even have an OTA guide! Why have an OTA tuner with no guide information?
The 921 also doesn't have name based recording, seasons pass, wish lists etc.
The 921 does have a UHF remote and the speed is much better than the Tivo. It also has RGB output. You could say that the 921 can be 'upgraded' with its internal slots but we all know that will only happen after I have been appointed as US Embassador to Iraq! Other than these few things the HD Tivo beats the pants off of the 921.
Some of the advantages of the HD Tivo are: OTA Guide (what the hell was Dish Network thinking?), 2 OTA tuners, HDMI, Name Based recording with all the perks - Seasons Pass, Wish Lists etc., you can increase the storage space (as long as you don't mind voiding your warranty).
Anyone have any sales numbers of 921 vs HD Tivo? I'd bet the 921 failures would be more apparent but it looks like they have only sold a few thousand of these at most.... And now it looks like they have discontinued it.
My biggest bitch with the HD Tivo is the speed is pathetic. Next on my list is that they don't make a CableCard version of it. Another trouble spot would be not with the box but with DirecTV and their dumbing down of their HD picture quality (Dish Network also lowers the PQ of their HD).
Why is the 921 the 'most advanced' again? I just don't see it!