Instruct: Classify Amazon reviews into positive or negative sentiment
Query: defective

The jumpsnap computer is defective - put in batteries received with package, turned on unit and tried jumping. Everything worked well and unit turned itself off as indicated in the instruction pamphlet. The next morning when I went to use the jumpsnap, the batteries were dead. Put in a second new set of batteries and the exact same thing happened again. Apparently there is a electronic short in the unit I received and I have decided that this product has been out long enough to have fixed all these bugs/problems, yet they haven't, so I have elected not to receive a replacement unit. I would not recommend this product.