Jenn P. Zonca - I use SilverFast AI Studio with my CanoScan 8400F scanner. The SilverFast controls allow me to acquire my transparencies and negatives with greater sharpness, contrast and color saturation, much closer to the original image, than the scanner's native software. I wouldn't use any other product than SilverFast!
SilverFast AI Studio's winning combination of Auto Adaptive Contrast Optimization, Multi-Sampling, and the MidPip4 - Advanced Color Cast Removal tools allow me to acquire images that the CanoScan 8400F software cannot handle.
SilverFast AI Studio's NegaFix tool does a much better job of handling color negatives than the native software of the CanoScan 8400F.
SilverFast AI Studio's suite of tools and my CanoScan 8400F allow me to acquire transparency and color negative images that I feel are comparable to a dedicated film scanner and a well-known suite of tools that rhyme with "price".