My evaluation of this app was very, very negative.
The developer states that it supports RAW - it *DOESN'T*. There is some talk of a separate RAW plugin, but no way to download it for evaluation.
Drag and drop from Aperture 2.1 DOESN'T work (the application states that it does, but the manual make no mention of Aperture, only iPhoto).
The developer expects a "value-added" donation in order to get the ability to read PSD files - this should be a standard feature and factored into the price.
In summary: if you use iPhoto or keep all your images in folders then this may work well for you. If you have a pro workflow involving RAW then it won't (as evaluated).