TweakTown posted a review on two Compro VideoMate TV Tuners

The T100 built up a channel list OK the first time ComproDTV2 ran, and we were able to surf between all channels without a problem. Opening all the subwindows using PIP and a different channel for each window caused some dramas, however. With each subwindow opened, performance within each window dropped substantially. The Compro website does state that for each window displayed, extra CPU power is needed, but the system we used should have been fine...possibly you need a VERY strong signal if you’re going down this path, or better signal caching.

Compro VideoMate TV Tuners – T100 Digital and U500 DVB-T