I saw this posted on a Facebook group that I belong to for beading and jewelry making.  Over time I have accumulated all sorts of beads - sizes, colors, shapes- and had no true means in which to organize them. I decided to try these after seeing the FB posting. Wow!  Great idea and I don't regret the purchase at all. I began storing my beads my size, then by color and used a permanent marker to identify each smaller box.  I also use one of the larger cases for all my findings.  Again, each smaller box is marked with earring components, toggles, etc.  I can go diectly to the boxes and know exactly where to find what I need.  For those who are headers or even crafters, these are a great organizer. Go for it and don't think twice!  You won't regret it. 

Pros: Perfect for organizing beading supplies.  
Cons: None.