I got mine today (international)! And then I promptly filled four of them!
Mini-review:-- These are really nice. High-quality cardboard & foam. Shipped quickly & as cheaply as possible.
-- The top layer is set up to hold the ESC thru F12 (and below) part of a standard ANSI layout... with one spot left over (novelty ESC?). The second layer has cutouts for the arrow/navigation block & numpad, plus cutouts for any extras you may have... Tsangan kit, stepped capslocks, ISO enter, etc. You shouldn't have trouble accommodating anything but the most extreme sets.
-- I recommend saving some of the smaller bits of cutout foam to fill gaps in the second layer (since you're less likely to fill it completely).
-- It's a bit tricky to get the caps in sometimes... they're held fairly securely by the foam at the top/bottom edges. But this means that they don't move around much, even if you shake the box.
Suggestions for improvements:1. I'd probably go with a smooth surface on the "bottom" of each layer, rather than foam. (Or just a smooth surface stuck to the existing piece of foam.)
-- The foam makes it hard to "slide" keys along the rows (important when you're inserting them out of order).
-- I don't think this would affect the fit (currently nice & tight), but it might make it easier to put the caps in, since the edges of the caps wouldn't grip the bottom.
2. Add a couple of "handles" to make it easier to lift the top layer.
-- It need not be fancy; even something as simple as a tab of paper (with a sticky part to attach to the bottom of the top layer) for each side.
-- An alternative might be to cut a couple of small notches along the side of the top layer... just enough to get your fingers into to allow you to lift the layer.
3. Add something to cover the top layer...
-- There's currently a small gap between the top layer and the top of the box when closed... i.e., the box is just slightly too tall.
-- Could be easily filled with a loose piece of foam or corrugated cardboard.
-- If your keys are shaken around, a few of them can come loose (most are OK... the fit is pretty tight, as I mentioned).
-- I think none of them would come loose with something to fill this gap. Or at least there'd be nowhere for them to go...
These are all pretty minor... hard to improve much on what is already a terrific product!
Bottom-line: I heartily recommend these to anyone who has a bunch of complete sets and wants to store them in something better than a ziplock (and at a reasonable price).