Bests & Worsts Reviews from Amazon

I ordered 2 of these based on 4 perfect "5" reviews hoping I will have the same experience, plus I was convinced by the fact that it is solar-powered and can be charged by a USB cable (battery-operated ones are very high maintenance). I have a problem with my crazy neighbor's cats pooping all over my front and back yards. I received the items 3 days ago, charged them and set them up in the backyard. Last night I checked on them, set them up to frequency 5 to get the most effect and they were flashing while I was holding and close by. It's actually fascinating to watch it flash and I was really convinced it would scare the cats off. So I checked my backyard this morning, and lo and behold, there was fresh cat poop 3 feet away from where I set up one of these repellers. My shoulders fell, and I was so heart-broken because it only means I have not found a solution to my problem with the cats, and that this does not really work as raved by those early reviewers. Sorry for this negative review, but I was really hoping I will get it right this time, as I have already purchased another brand before which was really useless and turned out to be just a waste of money. Update: December 12, 2015 I never could understand how the rating of this product is high. I have a security camera now and I could see my neighbor's cats hanging out near where I installed the 2 units I purchased. They're opearational coz they flash every time I go near them, but they don't scare the cats. And, you don't even need a security camera to realize it does not work once you see the cats' poops near where these units are installed. So very disappointing ...Tips to those who have problems with stray cats and crazy neighbors: The 99 cents fly traps work better because when the cats stepped on them, they always go crazy running around until the traps are removed, I noticed that the visits have gone down 90%, the cats tend to find other way ins, I just put fly traps there, and then cats step on them again and they avoid those areas. That's where my security camera really helps, I am able to spy where the cats try to sneak in my property.