This program is very appealing at the first glance. But after months of use on several thousand of pictures, I am sorry I have to say that
1) the support is nul : I never got an answer, for a suggestion or for a glitch
2) the manipulation is hitchy and any hesitation in a drag and drop could turn into a catastrophy, because there is no Command-Z for cancelling the last action
3) there is no function for controlling the integrity of a catalog, nor to rebuild it
4) the user manual is miserable : uncomplete and not didactic at all
5) the import function from one catalog to another is just blow job, as you have first to recreate by hand all your pictures sets and drag their content folder after folder
6) data disappear without warning and without obvious reason
I have put a lot of hope in that program, have spent hundreds of hours cataloging, which have been ruined in a second at the moment I was saving.