Right,

* Can do everything that SDL_Image do and more
* Avoid using tons of dlls on your game
* Easy to Use
* You can easy load a image from file, stream, pointer
* More formats supported {you can easy remove the ones that you don't use to reduce size}
* Imagemanipulation {format, alpha, rotate, resize ... and others}
* FPC, Delphi compatible
* Win and Unix compatible