I bought a new Gen 4 G17. Shoots good but I need the large grip so the only benefit to me over a Gen 3 is the mag release. I had Neves put Truglo TFO's on it which are awsome for work/carry but I can see they suck for target at anything past 15 yds, for me anyways. I put 200rds through it so far with no problems what so ever. May have to switch sights before the GSSF match though.