This unit does not have any kind of focus so if you have vision problems or wear glasses you probably will not like it. This unit mounts on the front of a regular rifle scope so if you have a rear focus it may work for you. If you have good eyes, this is a good unit.
Pros: Very compact and a wide field of view.
Cons: Got glassed or vision problems, forget it
This review was written in the old system and had content requirements that are different than reviews written today.