Mattleycrue76 wrote: Some people compare it to bow hunting.
Good analogy Matt. As far as efficiency of shots per minute, its hard to beat a pole spear. However, the effectiveness of the pole spear can take a while to master. Learning to aim it correctly is a skill in it's own. Even though it is only a millisecond, and hand movement after you release the thing will cause a big deflection in where the pointy end is going... in my experience anyway. AND to keep the pole spear loaded while you are tracking a fish requires a good deal of pressure on your hand. I found that if I kept it loaded for any longer than about 10 seconds with my dry gloves on, my grip wold slowly release.
If you go with a gun, make sure you check out the trigger and safety mechanism WITH your gloves on prior to buying it. the JBL is a great gun, but the safety on the older models was a PITA for me (the metal tab on the side). The newer models with the plastic safety is a much better design. Down here in Florida, it seems nobody dives with the safety on anyways.
On a final note, the nice thing about a pole spear is that you can pick one up for around $30.00