No good for images.
If you are trying to hide your porn collection, do not use this app. Dont use it for your regular image collection either, because it takes forever to open files. Similarly, once your pictures are in, you cant get them back out, unless you export them. This wouldnt be a problem except that there is no "Select All" option, which means that if you have several Gbs of pictures, you are screwed, unless you want to take hours clicking each picture (keeping in mind that every two or three pictures, the program will stop for a good ten seconds to process). The only reason I gave it two stars was because I should have read the reviews, which warned me this might happen.
Maybe this works for low-data files like documents and such, and only in manageable quantities, but if you are trying to hide something embarassing from the wife and kids, this isnt the program for you.
Aquatus1 about Secret Spy Folder - Hide and Protect Personal Sensitive Files