This isn’t for sorting 2-3 left over pieces from built sets. This is for sorting bulk boxes of bricks like you might have after your kids play with their sets and dump everything into a big pile
I'm not against it as much as in aww because the device itself is made of A LOT of legos, so not only do you have a lot of legos from building the sorting device but then you have a lot of legos for the sorting device to be useful.