i had tv402u & returned it because of picture quality problem & like other hardware based encoder tv capture/tuner cards, software support simply sucks
there are cheaper solutions are there with similar picture quality; if you don't mind mce only driver, adaptec has a two tuner usb2 for around 200usd including a remote controller. based on my friend's unit, the picture quality seemed like bit better than tv402u
max mpeg2/4 bit rates are low enough causing problems
i think there are two problems that caused picture quality problems
- lack of hardware deinterlacing (i am not even talking advanced de-interlacing features like de-ghosting & adaptive 3d comb filtering)
- low max bit rates for both mpeg2&4
in us, it's difficult to find a good quality tv tuner, but if you understand either japanese or korean (both ntsc), you can find a very good usb2 capture board.
canopus advc300 dv capture board was the best i have ever seen (very pricy though ~500usd) & does not need much of any thing as it is a dv capture board (ieee1394a), but the capture files are really big