I carry it everyday as a backup to my 226.

Anyone else like this knife, any cons to it?

Had one.  Liked it, but two problems

1.  The assist spring tended to wear out pretty quickly.  
2.  The clip came off pretty easy.

Of the three or four I have seen (all buddies on mine not my own) they loosen up alot after some use and became very unsafe when cutting things, they would tend to close.

I HATE AO knives without a flipper.  BUT, the Ken Onion series has some good knives.  I would not cary one as a fighting knife, tho.  My torsion bar failed after 3 mo.  They replaced the part quickly, and I still love and cary the knife.   But you will just have to think of it as a reg. maintenence thing.  I had a few shipped so when it starts to go I can switch it out.  Overall I love the knife.  I may have to get one in S30V.