Have owned 6 of these for about 6 or 7 years - Ultradot Pan AV Red Dot Sight

I have 6 of these sights mounted on the following firearms: Ruger MK III 22LR target pistol, S&W 686 .357 magnum, Ruger Super Redhawk .44 magnum, Ruger Super Redhawk .454 Casull, Freedom Arms .454 Casull, Ruger 10/22 rifle, Thompson Center .50 caliber Bone Collector black powder rifle. All have performed well for me and have held their zeros well with many rounds fired thru the various handgun including the large magnum calibers. The Ultradot on the heavy recoiling .50 caliber Thompson Center has also served me well. The brightness adjustments function well thru the full range of light conditions from bright sunny days to late in the day dark overcast lighting conditions.
I only use the plain red dot and have never used any of the other 3 reticles so I cannot speak to the functionality of those reticles. However, the size and clarity of the plain dot has served me well for both hunting and target shooting. The only problem that I have experienced is the sights are fragile to the extent that they will likely not survive the impact if the firearm they are mounted on is dropped. I dropped my Freedon Arms .454 Casull and the sight shattered and was not fixable, but I consider that my being at fault and I promptly replaced the sight with another Ultradot Pan AV. I must admit that I purchased all but one of my sights during a time period in which they could be found online during sale promotions in the $160-$165 price range but I still consider the current prices of $235-$250 to be a reasonable value all things considered.