As an Deep Cover Operative, suppressors are an absolute must. I merely keep the suppressor separate from the M&P40 Shield until the target has been acquired.
But seriously, I bought it because the CCI Blazer ammo I have on hand says right on the box not to shoot it through a ported barrel, so I needed a non-ported barrel, and this barrel was on sale. Furthermore, the fact that it's a bit longer than a stock barrel with give it a little boost in performance.
Many of you seem to have much larger pockets than I have. Any J Frame I have won't go completely into my front pocket of my jeans. My Ruger LCP does. My 365 doesn't. I normally carry on my belt with a shirt out or cover.
This time of year, .32 Seecamp in my back pocket in a wallet holster. A Sig P365 in the console. A Kimber 10MM 1911 in the safe in the back of the car and a Suppressed Rattler SBR in case things go really far south. (I'm also a reserve police officer and the larger hardware is for a call out.)