Really, the SF doesn't conceal any better than the regular frame. The only difference is grip diameter. Length, width and height of the guns are identical.
For me, even with the SF frame, the grip was too big. I sold my 29SF several months ago. I love 10mm, it was just too hard for me to handle in that package, but I have some hand issues. When I got it, it was great, but as my hands got worse, the gun got to be hard to control. I couldn't touch my middle finger to my thumb on the SF grip, like I can with all of my other guns.
I hated selling it; it was my favorite gun and my primary carry gun.