I use it with J2.5 and Im resizing pics on my frontpage, showing them in a Joomla modal.
The tool has many options, like: pictures in front page, in articles, how show the picture (shadowbox, lightbox, etc).
My review is: EXCELLENT, but I have to warn that I had problems when using shadowbox, lightbox, etc., sometimes the effect didn't work and the link left my user to another page only with the image, forcing users to use the back button from their browsers. It seems like cant charge 100% of the page, so the users clicks before its complete.
Sorry for my english!