Had a chance to play around with a Gen4 G17 today at my local gun dealer's shop. Gotta say, I don't like it. Only thing I found superior to the Gen3's was possibly the dual recoil spring system. I can see how this would certainly take up some recoil and help with accuracy and follow up shots. Beyond that though, the Gen4's seem more gimmicky to me than anything else. The adjustable back straps? What's the point really? Most people are going to stick with whatever the default strap is. The default strap is pretty much spec with Gen 3 frames...which for most were comfortable as is. Having options is certainly a nice thing, but in this case, I really feel it's kinda moot. The other two straps didn't really feel all that different from the one installed at the factory...so again...I kinda have to ask...what's the point? The frame texture is okay. Too rough for my taste. It's definitely not as rough as a RTF model but I didn't find that it gave me any better grip on the pistol than a standard Gen3 frame did. Honestly to me, the Gen4 G17 felt kinda blocky in my hand especially around the front strap. The Gen3 feels a little more rounded to me....more comfortable. To me, the Gen4's just seem like change for the sake of change rather than any true innovation or needed upgrade. I'm sticking with my Gen3's and hope they don't phase them out entirely...my gun dealer agreed. Having said all this, I'm sure the Gen4's are fine pistols and just as durable and reliable as any Glock out there. The changes though, just seem pointless and I don't care for them.