I have a set of four expensive storage containers. They don't leak. They do fine in the microwave. They do great in the dishwasher. They also cost about 6 times what these cost. I am budget conscious, and those were a gift. I lose lids. I bring dishes somewhere and then forget them. These storage containers are prefect for me because they are cheap and get the job done. Do they leak? Sure, sometimes. Do they work well in the microwave? Not particularly--they will heat in the microwave but doing so for too long seems to badly warp them. I am guessing it can also melt them. They work in the freezer. They can go into the dishwasher. Eventually the lids warp, but it's not a big ordeal for what I use these for (mostly storing fruits and vegetables for my kid to bring to school). You get what you pay for, and these are great for the budget conscious.