I purchased these cubes for my yoga room, and they work very well for the purpose for which they were intended.  I put them together in a way that allows a length of two blocks across flanked by two higher columns; this provides a length of space in the center that accommodates mats and bolsters, while the other cubes hold other items such as blankets, blocks, pillows, straps, and other light fitness-related equipment.  They were easy to put together, provide a considerable amount of organizational space, they're reasonably sturdy, and they look nice.  I consider them to be a great value, especially after looking at other yoga storage units online.  Additionally, if I decide to build or purchase a more permanent structure, I can use these blocks for storage anywhere else in the house, even inside a closet.