This could have been a really good episode, but Laas is just such a dick and that spoils things a bit too much. Being overtly racist the way he is is bad enough, but he's also just rude and antagonistic (props to Ezri for sarcastically rolling with it). He also straight up murders that Klingon after egging him on. All credit to JG Hertzler playing the role, though, who manages to be nearly unrecognisable from his usual character of General Martok.
Anyway, Laas is going to fit right in among the Founders if he ever finds them.
I am a fan of the Odo/Kira stuff here, and Odo himself comes out of this episode really well. The closing shot is quite beautiful.