i'm very interested in your printing tool, i've tried in my canon ip5200 under feisty ubuntu and i'm astonished about the results

I have some questions before buy the license:
1) i love b&w print, i made some print with "super" quality settings and color mode grayscale: the print is very cool but not so accurate as printed in Windows, i notice that there is a little hard rumor, the print in Windows appear a little more soft, accurate. the registered version improve the quality?
2) i bought ilford professional papers, i have right icc profiles of papers. may i use them? or there are proply settings for ilford papers?
3) is bibble-lite program supported? i use this commercial (and excellent) program to develop my RAW files, and i would like to print with it
thank you very much, and keep up the wonderful work!
imopen