Bests & Worsts Reviews from Amazon

After considerable review of the different manufacturers of this type of product I chose Contech specifically because their customer reviews indicated it was a better product, i.e. better quality, performance, etc. compared to the competition. I'll relate my experience and let you be the judge. I ordered two of the StayAway Pet Deterrents and they arrived promptly. The product is easy to assemble and place into immediate use. However the motion sensors on both units proved to be hypersensitive. Instead of limiting their sensing range out to 3 feet (the manufacturer's specifications) they detected movement and activated at a range clear out to 15 feet. So now you can't walk through our living room at all without them activating. I contacted customer service who were very friendly and the rep told me she had not heard of such a problem and would consult with one of their engineers and call me back which she did in a timely fashion. She stated that the engineer indicated that it was a bad sensor within the unit and they promptly shipped me 2 new units at no cost. I now have 4 units and they all have the same exact problem. They all fire at a range out to 15 feet. Unfortunately in my case the excess sensing range renders them very impractical unless I want to be purchasing the expensive refill canisters every week and putting up with the annoying blast every time we walk through the living room (high traffic area). I'm sure that the product normally works as advertised. Every manufacturer produces a lemon from time to time. But 4 units all performing outside their specifications indicates to me their is no quality control going on and neither did their customer service take the time to ensure they were sending me a properly functioning replacement.