It increases rate of fire alot, its easier to shoot faster than a peice of crap single trigger
Weaknesses:
It tears apart ur grips, its ugly, and its plastic and wobbly, thats y i switched to a BSI stick trigger for my 98...its alot better
Conclusion:
Its good if u just want faster shooting, and dont mind cutting ur grips in half, but its a pain to get on ur gun...and i dont like its performance, i recommend the BSI stick trigger