Hey Bulldog. I have a 3-drawer unit similar to bluegrassbrian's. Pros/Cons, YMMV.
Pros--easy-access 3-drawer set-up, easy to throw a lot of jars in each drawer (roughly separated by tob type). Inexpensive, light and small--can always be re-purposed for other storage uses. A big PRO for me? It visually reduces the observable excess that having all those in-progress/sample jars stacked on a shelf can lead to, which can then lead to rolled eyes, or worse, calculating shark-eyes from my beautiful bride. It helped me de-clutter & think through how I wanted to store open tobacco, it keeps everything I'm trying out/pondering in one spot.
Cons--small though it is, it does take up some space. Mine came with wheels that I took off--too much rolling around while opening drawers. Speaking of rolling around, tins & jars can slide or topple when there's not much in each drawer. Solution? Always try out more tobacco! It's plastic--in my 18th C. fantasy cellar everything is wooden. Or leather. And built-in. My better half threatens to take the unit away for art supplies.
My sample jars/open tins are covered with plastic wrap, then a small disc of parchment paper, then lid screwed down. Helps prevent tob fragrance from leaching into rubber-ringed jar lids. Name/type/date written on jar with grease pencil--easy to wipe off/reuse. And as mentioned, I separate them by tob type in the drawers. I love muttonchop's organized & beautifully labeled system. Maybe someday.