The application is simple and works like it should. Most bulk resizers only deal with JPG or don't care to carry over the quality of a photo (mostly because they're used for sizing images DOWN rather than up).
My projects require me to bulk resize hundreds of sprites, which is a pain to do by hand because of the reasons above and the simple fact that it takes a few minutes to resize each sprite by hand at minimum. It's more painful when I think about literally everything else I could be working on, and this issue has single-handedly postponed a lot of my work in the last year or two.
The application is light and requires me to drop my sprites into a folder, choose a size and press a key. That's it. And, honestly, it's such a relief that it moved me to stop what I was doing and actually write a review for it. Kudos to the creator.