Sightmark's small reflex sights are useless - OpticsPlanet Exclusive Sightmark 1x Mini Shot A-Spec Reflex Sight

I wanted to like Sightmark's small reflex sights as I have a larger one I put on a .22 rifle and have been quite happy with. Unfortunately, despite my best hopes, they're junk. My first one was a gift purchased from the Ft Campbell PX. I was happy with how easily it mounted to my S&W m22s pistol's rail. The problem was immediate however. No matter how I tried the sight couldn't be adjusted to match the point of aim with the point of impact. The elevation adjustment worked fine but the windage adjustment only moved the point of impact between 12" to 6" right of the point of aim. Completely useless. Foolishly I thought I had just gotten a bad one and bought this replacement from the OpticsPlanet websight. The price was good and initially it seemed to work just fine. I was able to easily sight in the pistol and had an enjoyable couple of hours exercising the S&W (great gun BTW) with its new optical sight. The problem came when I pulled the pistol out of the safe a couple of weeks later to show my sons how well it was shooting. The sight wouldn't turn on at all. I assumed I had left the sight on and run down the battery. A quick run to the store to get a couple of spare batteries should have made it work again I thought. Nope! Dead as a doornail no matter what battery went in it. I tried cleaning contacts and making sure they were contacting the battery. Nope, Still dead. I can see from the reviews that the darn things work for some folks and I'm glad they haven't shared my bad experience with the Sightmark units but after two clunkers in a row I wouldn't risk a nickle on a third.