1. you have to have the right size for the knives you have.
2. You have to pay attention when stowing the knife.
3. They get all scungy.
This one has an open sided box packed with skewers and you just chuck the knives in. Yes the paring knives disappear into the skewers unless they are packed fairly tightly. I am always making kebabs so I figure they will get used faster than they get manky. Not recommended for clean freaks. Protip ; when you buy the skewers get twice as many as you could possibly imagine you will need .