I just bought a Max9 model 3519 as an upgrade from my EC9s. What a difference. I’ve put about 200rds through it so far, and it has been flawless. The sights are a lot like the EC9s, which isn’t a good thing, so I put some fluorescent green paint on the front sight, and fluorescent orange on the back sight. Makes acquisition really simple.
The Max9 just feels so much better in my hands than the EC9s did. And the stock Max9 trigger is much better than the EC9s. IMHO, the Max9 adds a “big boy” feel with a small package and great price.