The Dish T2200 thread is full of issues, have you checked that thread? Are the various issues all sorted now?
Yeah I've been following that thread since TiVo announced their end date to make an informed decision. Obviously can't be certain everything's been sorted however do have parents and parents-in-law who both have the same unit. Neither of them have reported any issues other than a little "sluggish" which as suggested could be due to the fairly narrow range of the remote IR.
The other advantage to the T2200 is their firmware is updated semi-regularly and incrementally fixes issues whereas I'm not sure Panasonic regularly update theirs.