Not magic, but does help a lot with wrist pain
I bought these because I was struggling to maintain poses due to wrist pain. These position your hands in a way that your weight is supported without bending the wrists. They made a significant difference to my ability to maintain poses without pain. It’s not magic, so holding a position that rests weight on your hands/arms still may cause pain. Also it can take longer to change position because the blocks have to be shifted a lot. Overall, really helpful devices for reducing wrist pain when holding yoga poses that rest weight on the hands.