A picture is worth a thousand words. So just have a look at these application screen shots to get an impression of the possibilities MB-Collage offers:
First start with the selection and definition of the layout:
Then fill the layout with your pictures (click on the images to enlarge them for details):
Enough theory. Let's download the version and create a collage yourself.
Still not convinced? Then have a look at this video and see how easy you can create an impressive collage: