I've used them once, and fell in love right away! I love going to the gym, but always loved the idea of a home gym. We're currently renting and don't have the space to build out a full home gym (nor would I want all that equipment). PowerBlock is so perfect for our needs and the only piece of gym equipment needed for an amazing leg day. Absolutely love that I can crank up the weights appropriate for each exercise. These weights feel high-quality and durable. I officially need a bench now that we have PowerBlock in our home to hit all muscle groups. Very happy to have received a set!