Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Huge disappointment!!!

I am so very disappointed in this product. With my first pregnancy, I was not able to hear a heartbeat until my seventh month. I am on my second pregnancy and am 25 weeks along. So far, I have not heard a damn thing but the cars outside my apartment building, the tv in the living room and even the neighbor's stereo downstairs below me. I was very close to trashing it during my first pregnancy, but this time, I chunked that damn thing in the trash! Do not waste your money on this product. If it's priced below 100 bucks, then it's probably a piece of junk. Just go off of your baby's movement every day for re-assurance that all is well.