I have purchased the core boards from M.I.Late and am in the process of putting all of my stash on the boards. I just placed my second order with her to finish the job. I'm a fan of the boards for many reasons; easy to see what I have, can group fabric by theme or color, takes up less room, know how much of each I have, etc. Do believe it is a individual thing, not everyone will like them; but those of us who like the idea know that Gayle is offering a terrific deal. On that note, a member said she purchased the core board from the hardware store and made her own. I bought two sheets at $9.48 for a 24 x 36 sheet, an investment of $18.96. My husband measured and cut, not the easiest stuff to cut, and I got nine large boards out of each sheet so that makes each board quite pricey. Three boards fron each sheet were large, in order to use every inch of material, and I used those to hold ten yards of fabric. It worked great, but the cost was greater. Also the cuts, while my DH did a terrific job, were not as perfect as the ones I purchase from Gayle. This is a case where I'm sure practice would perfect the technique, but it is still not economical.
So to sum up, I'm a big fan of the boards for reasons I've stated. I will post a picture of my completed stash along with "before" pix. I really splurged on my stash at the end of the year with all the clearance sales, but it really needs organizing. I tried all different kinds of folds, but couldn't really see my collection the way I wanted to be able to. I also am a book collector and so it just followed that having my fabric as neatly arranged as my books would work for me.
You should do research if you decide to try the board method. I tried three different retailers (and my DIY try) and the most economical, best product, and satisfaction is with Gayle's, M.I.Late, product.
If you have any questions I'd be happy to share my experiences.