I have three Storms - the PX4 9mm, CX4 9mm, and the PX4 9mm sub-compact. The two pistols conceal well with a Crossbreed IWB holster. The Super Tuck model with a single belt clip works well with the sub-compact. Both pistols are the F model which is DA/SA. The PX4 is accurate, reliable, and has relatively little recoil in 9mm. Holds a 17 or 20 round magazine. The 9mm sub-compact version comes with two 13-round magazines, one with a fold-down base giving you room for another finger. Weapon is relatively light even when loaded. I do find the sub-compact less accurate with a 3" barrel compared to the 4" full size 9mm. Both are accurate at 21 feet and closer, with the full size shooting better at longer ranges. The CX4 is the carbine. I put a front grip and a cheap red dot scope on mine. It uses a 17 or 20 round magazine. For $50-60, if you have the military F92 version of the Beretta you can get a magazine insert that allows you to use the F92 magazines, including a 30 round version in the CX4. Accuracy standing with the red dot at 100 yards is about a 3" radius circle. The subcompact can use the 17 and 20 round magazines along with the 13 round ones. I carry a 13 round magazine in the weapon. I carry a 17 or 20 round spare magazine in a belt mag holder along with a separate light in its holder on the left, pistol on the right. All three can be concealed under a T-shirt. The spare magazine may show some but you can show the light is making the bulge. The pistol doesn't show. The Carbine uses the same 17 round and 20 round magazines as the PX4 Storm. The larger magazines do protrude from the bottom of the subcompact but don't affect its function.
I would definitely recommend it over a pocket 9mm. It makes a good summer carry gun and for a woman a good year-round carry gun. I usually try and carry the full size PX4 in the winter where I have more clothing on to conceal it and its larger size makes it easier to handle, especially if I am wearing gloves.