I don't review a lot of products, but I think this product is worth my time.
We have two sets of these blocks. We purchased them roughly 3 years ago. My 3 and 5 year old play with them all the time. They sit on them, stand on them, and pile heavy toys on top of them. I have no idea how or why they hold up, but they do. They still looks shiny and new, even though they are piled in a spot that recieves direct sunlight. Very nice product.