Ive played with a few, had a UTG ( i think ) on my Saiga for a little while. They seem to work good enough. I had two problems with mine, First, it ate through batteries. Second was because it ate through batteries, I couldnt spend much time out shooting with it in the desert, just too bright, and the spot would be invisible. another one I had was pretty good with the battery, but was the size of a beer can! looekd smaller when i ordered it. im all for full field of view when aiming, but both eyes could almost look through that sucker!
I gotta say though, yes, my Eotech that I got 2 years ago when i re enlisted ad got that big incentive check, is just awesome. great battery life, great visible reticle, I just love that thing. Thats the problem I have found with red dots, and a lot else in life, you get what you pay for. do you want to have one just to use every now and then in a nice calm environment, or do you want one that you can drop on its head and pick it up and it forgives you, says thanks, and keeps on going. My eotech was like $450. And i have abused that sucker.