The first few glocks I shot I did not like. I was not impressed with the feel of the gun in my hand (personal preference). I've had several glocks over the years and did not keep them because I was not impress with how they shoot. Yes, they are great combat accurate, dependable, ect...
Try the Glock factory in Smyrna. They replaced almost all the parts in mine for free... I bought a nice set of night sights from them for $100 and they installed them for free. Good People!
I have both guns, sort of. My Sig 220 is the old school stamped slide and shoots great. I've replace the springs, installed the STR, and new sights. I've had many Sigs and I still have 3. The 220 is the best shooting Sig model of all the different Sigs I've shot. Single stack and long...