Not a SP fan - too large for a cell phone and so too many people might be curious as to what's inside. Too easily opened and have contents stolen. Too awkward IMHO.
I'd go with Pocket Carry if no other means are suiting to your dress, lifestyle and work. I did ankle carry for 5 years but finally got fed up with it and the slow ability to ready the gun. If you have something like a DeSantis Nemesis pocket holster (really good) and a M60, 36, 37, 637, etc. you should be GTG.
IMHO out of sight = out of mind! With a SP holster you'll always be self conscious wondering if people know or are curious what's inside.