I have been running this vortex behined my Eotech XPS2-0 for a month now, the magnifier is clear, the mout is made by American Defense and is on par with Larue quality, and for the price I have yet to find a major fault. Some others complain it touches the MBUS rear sight, it clears the Troy and KAC Micro 600m no problem, for those that have a MBUS you can shave off a little of the rubber on the rubber protector with an exacto knife ans solve the contact problem, or just buy a smaller sight. The eye relief is about 3" maybe a little less, not a problem for the way I run my rifle. All things considered this is the best sight combo out there for the money.
Pros: value, quality, rugged
Cons: none yet
This review was written in the old system and had content requirements that are different than reviews written today.