It is a very quick and easy way to load magazines up as long as you have stripper clips. It is kind of hard to get the ammunition loader attached to the magazine at first. It is easiest to do with the USGI mags and a bit harder with polymer magazines.
Pros: quick for loading ammuntion
Cons: sometimes hard to fit on magazine, expensive
This review was written in the old system and had content requirements that are different than reviews written today.