Even the second gen Sig 365 is having issues. One is the frame is to small and people are pushing up on the slide lock with a normal combat grip. NOT something you want to happen in a stressful situation!

The S&W Shield has better ergonomics, better looks, and from what I have seen shoots tighter groups.

You can get 10 round mags for the Shield but 8 plus one is good enough for me with a 8 round backup. You should ALWAYS carry a extra mag!!
That gives you 17 rounds without larger mags.
The above post give ample examples of other problems.

Be SAFE and shoot often!