VintaSoft Imaging .NET SDK and Plug-ins Discussions

It's known that JBIG2 is the most efficient compression for archiving black-and-white multipage images and it can help save up to 90% of disk space in comparison e.g. with multipage TIFF.

But often the main point is the image quality we get after converting to JBIG2. It's also known there are two possible compression modes: lossless and lossy.
When the first doesn't cause image quality at all, the second does. At the same time lossy mode allows us to get better compression results and resulting file size.
It should be also kept in mind the importance of JBIG2 Symbol dictionary. Sharing Lossy compression mode and correct tuned Symbol dictionary will provide the most effective compression for black-and-white textual content images.

So I'd like to suggest this topic for programmers who want share their experince on this matter. How the converting to JBIG2 image format affect your images quality? Is there anything to be improved?