I have a mixed opinion about extended mags, on some of my favorites, like the UMP, TMP, and F2000 (Yes I use it and am damn decent with it), the extra ammo is useful in the middle of a heated gunfight so I don't reload as often but I've gotten into the habit of reloading after every or every other kill, so its not that great an issue. The challenge to get it for your main is pretty time consuming and obnoxious but both times I've got it I felt an almost euphoric sense of accomplishment. It can also make you appreciate your weapon more, I started out liking my FAL but by the time I got ext. mags. I was in love with it. So, it really comes down to the whole "You get back that which you put into it." factor, if you put in the effort, you will be rewarded, if not then not.