Laser works poorly--hard to get it to fire consistently. You can occasionally get it to work fairly well--but it takes a frustrating amount of "fiddling" to get some functionality out of it. If you have a good amount of patience (if no patience, avoid this product)and can get it to work, training with it can be effective.
Cons: does not function well
This review was written in the old system and had content requirements that are different than reviews written today.