I recently downloaded the demo version of PrintFab Pro.
I printed a few test images both in RGB and CMYK and the RGB images were much more succesful. I tried printing CMYK images straight from Photoshop and Illustrator and the results don't appear to be much better than my default Epson driver (I'm using an Epson Stylus Photo R300).
My question is: how much difference would it make if I used your profile measurement service to create a tailored ICC profile?
The main reason I'm interested in buying PrintFab is because of the CMYK proofing facility. Is it possible to pay for a single profile measurement service whilst using the demo version - just to see how much difference it makes?