I took it shooting twice. The first was just a single mag, as I was actually there for someone else. I grouped a full mag at about 5 inches, which is astounding for me. I went again today and put 100 rounds through. It feels good, I can shoot it as good or better than the Glock when I'm taking my time, but I can shoot it way better when I'm emptying a mag. I hit the sillouette on every shot, again, astounding for me.
The Glock sold within hours. I also ordered both a Fobus paddle and a THIS ONE
Love the Sig. I tasted the Glock Koolaid but I don't like the trigger at all. The Sig trigger fits me much better, and I know I'll get better with it.
And as far as swapping out barrels and mags, that's not a draw for me.