Notable for being Bryan Fuller's first go at writing for Star Trek, I think this is mostly a fine episode. It does seem, however, to be made up more of great moments rather than a cohesive whole. Kira telling Odo about her time in the resistance, and then especially the ending are spectacular scenes. The transporter murder onboard the runabout is surprisingly grisly and the interaction between the main characters feels very genuine through this.
But it has pacing issues, it feels like it takes a long while to really take off. The return of Lupaza and Furel - two characters I never really bought in to, they feel fake - kind of derails things for me, and then just killing them off feels like they never really had any purpose.
Their deaths do propel Kira to doing some very rash things though. The episode brings into light (ha) the truth that Kira Nerys was a terrorist, there's no doubt about that. Since the beginning of the show, there have been numerous attempts to get her to come to terms with the violence she inflicted and make her realise that she may regret past actions, that not all Cardassians are to be hated. Here she is worked up into such a state of grief, fear and rage that she throws everything back into Prin's face and admits gleefully that she killed for a good reason, and no matter who got hurt it was worth it. It feels a bit at odds with what her character has been though these past few years, but it also manages to feel like the real Kira being allowed to say things she's had bottled up. I think it works and it makes for extremely gripping television.
The only thing which didn't ring at all true for me was that she neglects the safety of the baby inside her by rushing off for revenge.