After reading the reviews, I could not believe that people gave the product a poor review for misuse. The product is excellent. It heats evenly and effectively. The user needs to remember to watch the opening and not pour out boiling water or put their hand over the opening where steam comes out. You can't beat this for the price. I used the double boiler for a whole day while heating candy melts and chocolate. worked very well. the shape of the inner bowl also makes it very easy to clean. Hopefully this will hold up with time, but for now, it worked great.