I've got a HD-DVR250 and it's fine for watching any live TV or switching channels and the EPG is reasonable quick.
But for any of the DVR functions (other than playback) there is considerable lag. Hitting the TIVo button usually takes 25-40 seconds to bring up the menu to see recorded shows or set up a season pass.
When I decide to record a show, there's also a 25-40 second lag before it accepts the recording instruction.
I don't know if the disk is fragged or what, but is there any advice on what to do. I'm looking for an option that doesn't include sending it out for service if there is one.