I read a lot of the reviews at VT before using the app. Be sure to dig below the top three reviews to get a good idea about what it can and cannot do. It has file recovery and other features that I haven't used.
My friend is not computer-savvy in the least. Like a lot of folks, she has trouble finding the time to learn much about her Mac and specific programs. On the other hand, she is making some effort and I'm encouraging her to keep working at it. Her real love is photography. iPhoto Library Manager makes it simple and fast for her to deal with her burgeoning photo collection and then get back to making pictures, which is what she would rather be doing...
For someone like her, an app like this that provides a relatively easy to decipher GUI helps her get the job done, so it's worth every penny.