Gen 4 glocks have a recoil spring recall not a big deal. I will say that all of my glocks have hit me with brass at some point its gonna happen. However if I had one that did it really bad I'd send it in. Glock stands behind their guns. The cz is a good gun just not as mass produced. Parts and accessories are far more available for glocks over pretty much any other handgun. I'd also recommend the s&w m&p line and do yourself a favor and look at the ruger sr9.