Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice product but doesn't fit as advertised

I bought this double boiler specifically for my 2 1/2qt Calphalon Professional Saucepan thinking it would fit together nicely as it was advertised "fits all Calphalon Professional and Commercial 2 1/2qt saucepans". Wrong. Not only is there a decent sized gap around the edges where the double boiler pan should snuggly meet the saucepan, but the bottom of the double boiler sits directly on the bottom of the saucepan, not allowing for any water barrier, and essentially, defeating the purpose of using a double boiler. I'm very disappointed. The product itself is well made and feels quite durable and sturdy but it was mismatched with my saucepan. I mistakenly threw out the packaging before realizing this and am now unable to return it....anyone need a double boiler pan and want to take a gamble that it will fit your saucepan?!