I don't think anyone likes them here because of washout, which they will.
With that said, I have had one for about three years and it works great.
I use mine for hunting hogs and it has been replaced over and over by eotech, aimpoint, cqt, accupoint, and a few other scopes and cheap red dots, BUT it always finds its way back on my ar because it is the best I have found for what I use it for. I'm trying an acog next, and if that doesn't work better, mepor21 stays forever.
My complaint of the sight is the light source that shines the dot on the glass can be covered up (leaf, stick, etc.) This has only happened to me once with lots of use. The other complaint is the dark glass; hard to see "target" when cowitnessing irons for longer shots, but it is useable.
In my opinion its pros outweigh the cons for my intended use.
I would try and find a used one or a trijicon used(they are easier to find) because they are about half price.