I have had this sight for less than a month and the dot began to flicker on and off intermittently; now, a few months later, it has stopped working altogether.
As others have stated, zeroing this sight sucks, but is not impossible.
Overall, if you get one that works, it is really a great sight, but I suppose it's a roll of the dice. Mine is going back to NcStar, but I may end up just selling it and saving up for a Burris or other more dependable sight. Take your chances...
Pros: Inexpensive, compact, easy to use.
Cons: Difficult to zero, durability is ?????
This review was written in the old system and had content requirements that are different than reviews written today.