DO you have the latest version? After using the ATI one with my AIW-8500DV, compaired to my older Hauppauge tuner, the ATI software is probably the best I've ever used. IT has tonnes of features, and is pretty stable - what don't you like about it?
Of couse, my card was the only card ATI ever released with a DIGITAL tuner, everyone before and after has been digital. The tuner part is hot enough to burn the skin, but the channels change faster (just as fast as a regular TV, with the analog tuners there's a slight delay), and the quality is a little better IMHO