I use PavTube for coverting TiVo videos for my iPhone. It works very well and I haven't really had any problems. Conversion speed seems fine and the videos look good on the iPone. I saw Pavtube mentioned in the TiVo forums as a good way to convert for the iPad so I decided to try it. It's much better than TiVo's converter. TiVo's converters for mobile devices are terrible.