I picked up a NIB G20 last week from Bernies in a trade. First thing I did after returning home was install a 3.5 connector and polish the feedramp. These will be the only mods to this Glock. I noticed later that this is a E serial Glock and is on the framerail recall list but I don't intend to send it to Glock unless something breaks. I do carefully inspect the rails each time I clean it however. Two range visits and about 250rds thru it now. Ammo used was GA Arms 180gr FMJ and Blazer 200gr FMJ. Also a few Winchester 175gr Silvertips thru it as this will be my carry load. Accuracy is good but targets are hard to come by. Two 10mm rounds usually totally disintegrates the can into a hundred pieces! Factory sights are well regulated for this ammo. The 10rd factory mags are easy to fill to capacity unlike the G21 mags. I had one round that failed to chamber but the previous round sounded a little squibby so I write it off as ammo related. Other than that reliability has been 100%. Recoil is very tame but this is a LARGE pistol. People with smaller hands are going to have problems with it. This is my second G20 over the years and I do like the 10mm load. I much prefer it over the G21. Reasons being softer recoil, ease of mag loading, accuracy, knockdown power and bullet speed. At least in my perception. I already see evidence of slide peening starting on this G20 but it is really not unusual and nothing to be concerned about. When I do carry the G20 its in a Fobus paddle holster.