I am at the point of deciding whether to upgrade my son's SD TiVo to the THR22 before D*'s inventory runs out. My son is blind and has somehow learned to use a TiVo but a D* DVR is really hard for him.. My son has used his SD TiVo for years and the only thing I've had to do was replace the hard drive. He's happy with it but we're a little afraid at some point D* will force everyone to a HD DVR and then he will be screwed. There are so many internet threads complaining about the THR22 that it's hard to distinguish between what's a bug and some quirk they don't like. Could someone list all of the major bugs or bugs that are hard to live with so we can make an educated decision?