The case seems sturdy and should last quite a long time. Both the 3ds and regular ds cartridges fit perfectly in the middle sleeves, which have two rows of 4. But for some reason, the outer sleeves are rows of 5, and it is difficult to get the game into them by themself. It's a real struggle to get two of them in next to each other on these five rows (see photos). Not sure why they did that when the 4's were the perfect size. Maybe I got an abnormal one. Still, I'll be keeping it as the quality of the materials used to make it is good and it suits my purpose.