I love this rack! It is so versatile and saves so much space compared to other marker organizers. If you need to add more you can always get individual trays. But I suggest you get set to begin with! You'll wonder how you could ever have had anything else.
I like the look of the see through racks. My only regret is that they aren't bigger !!?? Maybe I have too many Copics !! Very sturdy and love the blue hue to the plastic.