i think it's one of the most powerful and moving episode of the entire show. the connor's performance was great : he managed to make me forget Trip and see him as Sim, not as Trip anymore.
i'am not an emotionnal guy, but when i saw Sim on the bed with Porthos, waiting death and the final scene in the sickbay, i admit i've had some tears.
Scott was great too. the fight between letting Trip die and letting Sim living was very well acted (ethical question).
oh, and the music was very beautiful. they have had an award for that and it was deserved.