This is not a good product and I strongly advise against buying it.
The stacking trays are a pretty nice concept. However, the fit is janky. I didn't have any problems with loose magnets, but I don't see the point of having them in the first place-- they aren't even strong enough to hold an empty box together.
I ordered two boxes. I received a refund for one box, which arrived with cracks in the lid and in the trays. On closer inspection, I found smaller cracks and stress marks in the other box. In other words, the material isn't strong enough to survive shipping.As others have said, the trays are too shallow to store SA caps or artisans. GMK R1-R4 will fit. However, GMK R5 will not fit. I had planned to use these boxes to hold some OG cherry caps, but that isn't an option because of the R5 caps.
Overall, I don't see the point of these boxes. They certainly don't meet any mk enthusiasts' needs, and they're way overpriced given the poor materials and execution. I hate to say this, but I actually prefer GMK trays over this product.
josh_bI've ended up just using them to store the extra spacebars that came with my keyboards and cap sets, and those take up a lot of space in the box anyway so it's not bad. My Topre keyboards also came with extra ASDW/esc/arrows so those are in there.