Not a good red dot for the price. I had this mounted on the wife's GSG-5 PK, and it broke after only a few months (maybe three trips to the range in total). The scope was never abused... It was always kept in a padded case. One day after about 60 rounds went through the gun the dot just started "floating" around in the sight, rendering it completely useless.
Pros: Mine was free...
Cons: Not very durable, hazy dot, much better sights available for same $
This review was written in the old system and had content requirements that are different than reviews written today.