Instruct: Classify Amazon reviews into positive or negative sentiment
Query: whats that noise

i baught the presto 12 c and thought i was getting a quality product. when i made my first pot during the brewing process i was hearing a loud rapping/clanking sound that was not the normal soft gergaling noises that you would expect from a perc coffee maker. this noise was intermittent not constant but was distracting none the less. i emailed presto and described the problem and they replyed that i didnt have the stem seated properly. well you can only seat the stem so far and thats it. i sent the product back to presto and they sent me a new unit with the same result. you might say i'm making much ado about nothing but this clanking noise was very distracting to me and i have to say it is a design flaw that was excceptable to presto. if you dont mind a noisy clanking coffee maker that makes decent coffee than the presto 12 c perculator is for you but not for me//tz