I wanted a "better" quality red dot to go on my 3 gun AR and chose this Sightro, Sightron S30-5. I was very pleased at how easy it was to sight in. I sighted in two red dots that day, the cheaper one I had to fiddle with. The Sightron was sighted in with three groups. Also didn't display any of the paralax of the cheaper scope.
I would buy one again.
Pros: Good red dot at a great price
Cons: none yet
This review was written in the old system and had content requirements that are different than reviews written today.