I loved this episode. I think I've watched it now, oh, I don't even know how many times. It's just so funny how Niles thinks that Daphne is going to have Frasier's child. So cute! I loved that he challenged Frasier to a duel because he thought he was negleting his child. Also, it was hilarious to see who everyone dressed up as. I especially loved Gil's costume. "Another mystery solved" :P Nice. I also loved that Roz actually got a real storyline that was more than just her dating every guy she saw. I was excited that she was going to have a baby. I saw this after the later episodes, though, so I knew what happened (I mean, I was like seven when tis originally aired).
Overall I really enjoyed this episode of Frasier.