I own the P365 Standard, 365X and two 365XLs so you can say I like this P365 family of handguns very much. I also bought a Shield Plus Optics Ready last spring. several months ago. Pluses and minuses of each:
P365 Standard: I must use the finger extension to get a good grip. I do not pocket carry these handguns so the pinky extension is not a problem for me. I've never liked my pinky hanging off the bottom of any handgun. The only thing it needs out of the box is a set of rubber Talon grips, which are also on all my polymer framed handguns except my Gen4 Glock 19s, which are already blocky enough. The little Sig has excellent night sights and a good (not great) trigger.
P365 X: I really prefer the slightly longer grip and of course the two additional rounds. Talon grips required also. I won't use an optic sight on this one. Like all my 365 triggers it is good but not great. Very useable for its intended purpose. No downsides to this handgun.
P365 XLs: My slight favorite of the three sizes. I have a Holosun 407k green dot and Wilson grip on one of them. Still learning the optic sight so not yet carrying it, but likely will some time in the future. My other XL has a manual safety and I carry it IWB some but mostly OWB. I carry it more often than the others. Safety off when OWB carry and safety on IWB. Personal choice that not everyone will agree with. Not downsides to these handguns.
Shield Plus Optic Ready:
Cons: Out of the box it had an unacceptable (to me) cosmetic flaw. Smith sent a return label, fixed the flaw and returned it in under two weeks. Second, it shot waaayyy left, more than any handgun I've ever owned. The rear sight of the Shield is non-adjustable. The owner's manual said to drift the front sight. Yeah, right! I soaked the sight repeatedly for over 24 hours at a time before repeatedly using my gunsmith punch set and beat the **** out of the side of the front sight and it wouldn't budge. Ordered a specific front sight pusher from Amazon. Soaked it repeatedly again with two different soaky type oils. Sight pusher would not budge it so I returned to Amazon.
Finally got out my old solid steel sight pusher, soaked the front sight again for two 48-hour sessions. Was able to get the slide solidly locked into my steel sight pusher (not made for front sights) and used a six inch hex wrench and LOTS of pressure. The sight finally broke loose with a loud CRACK. After that initial loosening it did not take undue pressure to move it the necessary amounts to get the gun sighted in correctly. Never had such a pain getting a handgun sighted in. I've now shot the gun more than 600 rounds and the only other issue is a roll pin working its way out of the frame enough to block the take down lever, so I've ordered a roll pin punch set to correct that.
My neighbor, who shoots with me most range trips, liked the feel of my Shield so much when I first bought it that he bought one as well. Unfortunately, his shoots far left also, although not as much as mine did. He has found a fiber optic front and rear sight set he likes and is going to have a gunsmith install them on his Shield.
Pros: I had an early Gen1 Shield for awhile and there is no comparison between that gun and my new Shield Plus OR. The factory sights are excellent for me. The texture of the whole polymer frame is great, best of any handgun I've ever owned with the exception of my two Walther PDPs. No Talons needed on this gun. It really is the type texture more polymer handgun makers should adopt. And the trigger is the best of any striker fired handgun I've ever owned, again with the exception of those two Walther PDPs along with my PPQs. The gun just shoots very accurate for its size and intended purpose. Now that I've fixed the front sight and silly left shooting problem I have to say I really, really like this gun. I don't order a holster for a handgun unless I consider it a keeper and I've just order an OWB Tulster for this one.
Bottom Line for the Shield: Obviously, most owners (I hope) don't have the way off center shooting that mine and my neighbor's had. Were it not for that I could recommend this handgun with confidence. I'll keep and carry mine during jacket and coat weather and I certainly enjoy shooting it. But, if I could only have this Shield or the P365X or XL, the nod goes to the Sig. I think it's the best of the micros. For me.