I have been comparing the Shadow systems, the ZEV OZ9 Combat and the Walther PDP at my LGS this week. I have to say I am really taken by the Zev. On this particular example it has the best trigger out of those three. To me the couple drawbacks are not having an ambi slide release and only some glock holsters will work with it. Love the feel of the gun along with the modular concept as well as the fact it would work with my 100 plus Glock mags that have been sitting unused since I bought the Q5 SF.