I got my first powerblocks in the 90s, I still have and use them. They are in great shape. Over the years I've bought other ones, I've got 5 sets, 90lb, 70lb, and three 50lb sets, when I go out of town I take one set with me for my hotel room. I've got a set in my office and In my apartment. They are the best thing I've ever purchased . The other brands don't come close to the durability and balance of power blocks. I'm not a weekend lifter, I've been a weight lifter since the late 90s. The best money I've ever spent, and would gladly spent it again. I can't say enough about them, I love my power blocks and where I go they go. I'm 62 years old and have trained my whole life, I can't imagine not having my power blocks. Of they're were one thing you could ever buy to train with it would be power blocks all the way, they are all you will ever need.