I have both the VP9 and two P30S's. I like both for different reasons. Certainly the trigger on the VP9 is excellent, but I always run the P30's cocked and locked so the single action trigger is fine for me. I agree with some of the others that the P30 seems more robust (solid) or whatever, but I am sure the VP9 will hold up just fine. When I choose one of them to carry, the P30's typically win out because they are slightly easier for me to conceal.
Bookmarks