Due to its small size, zeroing requires the use of a tiny screwdriver. Once set, however, it's been holding zero (so far) on my .454 Casull, which is no small feat. Sturdy unit, and adjustable brightness is a huge plus.
Pros: light weight, bright
Cons: Tiny, but that could be a PRO, too.
This review was written in the old system and had content requirements that are different than reviews written today.