I really like these glass bowls. The glass is nice and thick, but they aren't too heavy. They stack nicely, and the edges are nice and round not sharp. However, the two smaller lids are way too hard to get off the bowls. There's little to no flexibility in the lids, so it is a real struggle. The larger two are just fine. I still love the bowls, but I'm going to set the smaller lids aside and just use those two small bowls as serving and mixing bowls.