I work with seed beads, so this box is a great size for my projects. I'm not concerned that one side is going to spill its contents into the other. I was pleasantly surprised at the number of separate compartments on each side; each of them latches tightly.
Half of one side has removable inserts in that compartment, making it possible to store anything from seed beads to a needle case.
Bead storage containers are frequently flimsy; I'm really pleased with the sturdiness of this box. The only negative is the strap's weak nylon cord. I'll replace it before I carry it, but the cord is the only weak spot--the hole where the cord goes won't give way.
It's plastic, so I don't expect the box to last forever, but I highly recommend it. It's even cute!