This great for a free product, but I had hopes this product would be improved over the last several years and unfortunately it still is a pain to integrate. The so called tutorial is outdated by several revisions and the forum support is incredibly minimal. That being said I can not find a replacement for this module and I always come back for it and fight through all the quirks and bugs.
I think most people have issues with the images not being the correct size and @ 72 dpi. The latest version of this product I eventually got to work in IE8 and FF after several hours of trial and error, but it refuses to play nice in Safari.