I shot my friend's Sig 238 and I have no idea how many shells he had shot through his weapon. I shot just under a box and experienced maybe 2 jams. (My guess he had shot less than the 500 rounds. I believe the gun was fairly new.)
The Sig is a very well made firearm and is smaller than my Shield and would be a good choice if looking for a 380 firearm.
Back to the slim 9mm. I had such a frustrating road leading up to my Shield. I was honestly about ready to buy a revolver because my Kahr CM9 and Beretta Nano failed just enough to cause me some concern packing as a CCW. (About 2 FTE per 100 even after both went back to the shop and yes I gripped both hard to avoid limp wrist)
Honestly, with my Shield 9mm I have tried limp wrist to the point the gun nearly flew out of my hand, shot weak and cheap ammo, rapid fire, gang bang shooting sideways, weak hand upside down etc. and every time my Shield would kick every spent round out with authority.
I would be nuts to vote for any other slim 9mm but the Shield. I know in a crunch she will go bang and that is really all I want in a ccw.
P.S. After pocket packing for nearly 8 months and 500 rounds there is zero wear. Couldn't say that with my Beretta Nano. She showed wear marks after 200 rounds.