I have used this chronograph for about a year and seems to work very good. I have used it for everything from paintball guns to rifles. When using large rifles it tend to blow it apart and you have to keep reassembling it. I would just glue it together but it is nice to take apart for storage. Using a rifle also blew off the sticker on the front of the unit and it got lost. Overall it works like it should, and for the price I am very happy with it.
Pros: Accurate
Cons: Falls apart easily
This review was written in the old system and had content requirements that are different than reviews written today.