These work great for the type of games they were originally targeted for. GMT, GRD, GR/D, HMS, etc type game that have thousands of 1/2 inch "chits" / counters.
THey easily hold the 1000 pieces as advertised the only problem having them packed full like that is not very practical for playing the games.
Which means a game like Wavell's War, War in the Desert, and Balkan Front are Europa series games, I have them in 12 of the trays. The total chit count for these three games is 2,320 (Since Wavell's War reprints some of the Balkan Front counters). I use a total of 12 of the trays.
Sure they could fit in three trays but that would be combining things that would make it harder to actually use them to "play" the games.
When Total War comes out, (Reprint of Fire in the East Europa series), in the next couple of months it will have a counter count above 3500 so I'll probably need 18 or so.) Perhaps not so many since the more of the same type of unit (4-6 Russian Infantry Division, etc) doesn't have to be separated out in to its own box in the tray.
Hard to explain what I mean I guess.
Great product for what they were intended to be for.
As I have a huge collection of counters this was a must have.Its a pretty simple design,sturdy,closes tightly so the counters don't mix in their individual spaces nor do they fall outside.
If you have more than one of these you can stack them one on top of the other(the protrusions on the back of one, slip into the recess on the top of the other, so they take less space)
The price of each one is fairly low.(although if you don't have a hobby shop that can provide these near your residence you will still pay for shipping)
A downside is that you can fit up to large creature size counters(so you still need another box for the other creature sizes,such as Huge,Gargantuan etc)
Hence 3 stars.