I was first impressed by shoebox and bought a pro license: it's fast, load better than iphoto to manage large photo collection.
However, now, I would just discourage anyone to go and rely on this application to manage their photo collection. It's buggy and just unreliable. See the rest of my review.
After some time of usage and >30'000 photos entered and catalogued, I found the interface very buggy and missing the promissed "backup" feature... I had to go to complex manual file movements to get it to see photos as backuped...
I had emailed the support about these issues 4 months ago and never got any reply from them.
MORE IMPORTANTLY, apart from stability problem (the app would crash randomly and loose the data you had entered during the session), the missing -- but advertised -- backup feature and the UI bug... this application just breaks down when you try recovering from a backup.
I just updated to leopard, after backing up all the system, my photos and taking care of saving Shoebox database and preferences. After a reinstall, shoebox is unable to reuse the saved database... it just lost the tag data and backup info of 30'701 photos I had catalogued in it.
I already emailed their support 3 times in 4 months with no replies.
This is not worth 30$, not 70$, I won't even recommend it as a free software... even if I was quite positive about it when I first tried it...