I bought a couple of these items the last time Woot had them.
The Large Salt Box is very handy. It's sturdy and solidly built. The lid swings easily and is held closed by a magnet. The magnet isn't terribly strong, so it's very easy to open the lid, even if it's bumped accidentally. The interior compartment is about 3.5" diameter X 3" deep, so it holds a decent amount of salt. Makes it very easy to use with measuring spoon or your fingers if you like to grab a healthy pinch of kosher salt Alton Brown-style.
The Polyboo cutting board is a decent sized board, fine for medium side veggies and cuts of meat. You wouldn't want to use it for anything much larger than your prototypical 20-oz Porterhouse steak. It feels very sturdy for a portable cutting board.
It's very handy having the two different surfaces to work with. The whole thing is about 1/2" (13mm) thick, so each surface is probably 1/4" (6.35mm) thick on it's own. I would assume they're bonded with some type of adhesive, but there's actually a black poly trim around the periphery of the board and the handle cutout. The trim also serves to hold the two pieces together, so I don't see that possible separation of the layers would ever be a problem even if it did happen. I haven't had any problems with food bits getting up under the plastic trim, yet, although I suspect it could happen.
Both were good purchases. I haven't had any problems yet with splitting or delamination like we've heard about with the Core Bamboo brand products that show up on Woot periodically. The Totally Bamboo stuff (I also got the in-drawer knife block that Wot sold last time) feels very sturdy and very well built.
If you think would find any of these products useful, don't hesitate to buy. I think you'll be get a very quality product that you'll be happy with for years to come - just remember to oil the bamboo regularly with food grade mineral oil (can be found in your local drug store in the laxative section), or with more expensive Butcher Block Oil (which is basically the same thing). You might also find cutting board oil at your local supermarket if they sell bamboo cutting boards in their kitchen gadget aisle. (Publix used to, I haven't looked lately.)