Good question. I've always wondered this. I used them a few years back. Nothing crazy happened. But, they make so much sense in theory. On regular pots most of the roots grow on the outside. Also, I have so much roots in these little coco pots getting fed 4 times a day the holes are clogged. My opinion. I think buying a few is cool. But, I think spending any more than you did would be a little silly. Either way, you'll love them. When the grow is over, toss them in the washing machine.