I wasn't expecting it to be of such high quality after reading reviews from other buyers. But maybe I was lucky that my stuff turned out pretty good. I wouldn't say "top quality" but it's worth the money if you use it as a science education toy set for K-5 kids. Very funny for kids and parents. Upgrade after several months of using this product. After lots of fun science experiments with my little one over the summer holidays and distance learning at home, it has held up well for several months. So I think I should add another star. What more could you ask for at this low price?