Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Don't buy this item -- Big Problems

This product is poorly made and has multiple manufacturing problems, which could have been avoided: The idea is to use a GPS transmitter to locate your lost dog. Here is why I returned mine:1. GPS transmitter is NOT waterproof. The grey plastic case has a 2 inch long gap that would easily allow water to get inside it and destroy the electronics. Even overnight condensation could damage the unit.2. GPS transmitter easily falls out of the cheap black plastic case that attaches to your dogs' collar. You could find the transmitter (assuming no exposure to moisture), but not your beloved dog, who could be long gone.3. Antenna was shipped quite loose.Company was unresponsive when I notified them of these problems. I even offered remedies/inexpensive fixes they could have used, which they did not.Wait until another company comes up with a quality GPS locator for your dog, then buy it.