I just bought the application and have the followng comments. It worked very fast on my documents (all less than 10 pages) The comparison windows (lower two panes) do not show images or figures, just text. Would be great to show figures as well in a standard Reader format. The comparison documents and the diff engine ignore Notes (or Comments). It would good to have a Prerference to include Comments and Notes in Diff and document views. It would very useful to be able to output a Comparison PDF with differences in the documents 1) highlighted or 2) as Notes or Comments.