Overall I've enjoyed this one and am waiting on getting a few more for some of my other keys. I do want to note that because it can fit some taller key caps, that does mean there's more vertical space and so if you're moving it around and rustle it a bit, some of the keys can flip/skew and not look as neat in the storage. Would be interested if there's something that can be put on the bottom to make the keycaps stay in place more.
The max size is absolutely giant. It could probably store two keys of keycaps, or, in my case-the entirety of the Black Speech set plus numpad plus black extras. Latches pretty securely too. I’m quite happy.
I got the max version, it has plenty of space to store 2+ 75% keycap sets. Like some others have said some of the rows in the middle were too tight for my SA profile keycaps. Other than this only issue, I wish the case came in different colors. I got it on sale so for the price its a good case.
I'd been using the boxes the keys came in for storage, but that's a hassle. They don't always fit well, and you have to open the box to see what's inside. I'm mainly using the Max sized one I bought to store the left over keys from mixing some other sets together. I feel like $15 is a fair price. They won't hold up to being used as a self defense weapon, but they'll sit in a closet and display your spare keys just fine.
Bought three of the Max size trays and condensed seven keycaps sets into them without issue. Definitely a good option to reduce clutter from extra packaging.
I bought the Max version for my MT3 keycaps, but like others have said there are quality control issues. The spacing in my tray is not consistent and the keycaps don't actually fit in some of the rows, defeating the whole purpose of it. In particular the 1u slots are the exact size of the keycap so it's obviously not going to work.
Seems like a nice tray otherwise, but I would advise buying through another vendor. Drop would NOT accept a return or make any attempt toward a resolution. In case you get a dud like mine, it would be best to go through a seller that can return/refund or make an exchange.