I have 5 children so this was ideal, I can put more than one pair of the smaller childrens' shoes into one slot, creating even more room. It was very easy to put together, took about 15 minutes, no tools needed, It's sturdy and easy to just wipe over if needed. You can design it to your own combination depending on the space you have. I have mine as 3 across, 4 up and 1 more on top.
My only (very small) problem was with my older children, they wear boot type trainers and you can't fit them in side by side, had to have them one flat and one on its side, but it's not really a big problem, the product itself is a fantastic idea.