HOW IT WORKS? - I think having the images across the top and along the side draws your focal point towards the text initially 

WHAT DOESNT WORK ?- I think the images along the top are to busy, the don't really give it a comfortable balanced feeling when your first look at it.

WHAT ARE THE DIFFICULTIES WITH SPLITTING THE RECTANGLE? - I found it really hard to work out were to put my images and text, because all my images were a different size so it was hard to visualize were to put everything to make it work.