I recently transitioned to the 4" 2.0 Compact from a 1.0 Shield. It does take some getting use to as far as weight. The 3.6" was just being announced when I opted for the 2.0 as a carry gun. I will say that if I am in shorts and going kind of casual, I think the Shield would be easier to conceal. As an everyday carry though, I am sticking with the 2.0! What a great weapon and much better grip and trigger. I will say the texture of the grip took some getting used to up against the side! If size is a real deal killer, the Shield 2.0 has the great 2.0 grip and trigger for the same size as the 1.0. Either way you will be happy!