I had and still have since it hasn't sold, a Shield 1.0 that I did the works on. It has custom night sights, an Apex Duty/Carry kit, and other stuff done to it. I have handled and shot most of the later iterations and they are an improvement of a stock 1.0 but the Apex is better IMHO than all of the upgraded factory triggers. I also put an Apex forward set, flat faced trigger in my M&P 2.0 Compact which was also a huge improvement over stock. I sold my M&P 2.0 Compact and my Shield 1.0 and replaced them with guns that work better for me being a lefty. I also went to red dots and neither of them were set up for Dots.