You have to rub the block for a long time to get even a tiny amount of chalk on your hand. They're really hard! That can be a good thing if say you want to do grippers in the living room without getting chalk everywhere. But in my gym, I have cheap chalk, I end up with chalk on the floor but at least I can get a decent amount of chalk on my hand with one swipe. But when I go to the bar with my grip enthusiast friends and bring grippers, I put a piece of Spider Chalk on the table because I don't want the staff to get mad at us for getting chalk everywhere. Don't get me wrong, these are a good product and I've ordered it twice but if you're not worried about a bit of chalk on the floor, go with the cheap stuff. For other grip tasks like doing a pinch block or hub, you're better off with cheap stuff otherwise you'll spend an eternity getting a sufficient amount of chalk on each fingertip. It's easier to get plenty of chalk everywhere you need it with cheap chalk and rub the excess off on the hub/block than spending 5 minutes rubbing a piece of spider chalk in all the places you need to.