Anyone have any experience with these? I shot one and loved it. Just curious to know how they hold up with higher round count through them and such. The range i go to only had it on the rental fleet two weeks and i was the third person to shoot it. The main reason i'm interested in it is i already have my Glock 19 so between the ability to use Glock mags and shoot 9mm which i already shoot in my pistol it's a win all across the board. I guess i'm looking for any drawbacks or things to make me hold up and question should i get one.