I certainly wouldn't include inaccurate in any description on the sig pro series.
Or fragile.
Or unreliable.
Or with the 357SIG, underpowered.
Yeah, there are smaller guns, but it conceals ok, and personally, if I ever had to draw my piece, I'd want the biggest baddest piece I could carry without my knees buckling drawing attention to the gun. (A .300 win mag gets heavy after a while, and there's just no good way to present quickly when challenged.)
It's really a good compromise.
I've shot the smaller glock 357SIG, and it's a bear for me to shoot.
(Really light, really small, 2 finger grip, etc).
I couldn't shoot that gun under pressure, no way.
The sig pro series is a good all-purpose gun.
I suspect the only reasons it hasn't caught on is the lack of high-caps, was later to market than glocks, and has a proprietary sight rail.
Also (Operator error alert.) it's very easy to eject the mag under stress.
That would normally be a good thing, except that I bump it when carrying occasionally, and have had it eject under my pillow at night. (The H&K USP series has a much, much better mag release.)