What, does it come with a multiple-choice exam in the box? Do you activate it by solving a Rubik's Cube or something? ;)
No. The interface is exactly like the full product. You scan the damaged drive and it lists the files it has found, along with their dates and sizes. It just won't allow you to recover files above a certain size. If all your files were small documents, you wouldn't have to buy the product.
When the file allocation table is lost it is tricky to reassemble fragmented files. (This might be an obscure reason to run defrag.) On the NTFS disk I recovered there were multiple "views" of the files. The directory trees were partially lost of scrambled. It took quite a few hours to recover the important documents, but I got everything I needed -- Quicken files, several thousand emails, thousands of image files. I didn't try to recover anything but documents.