Thought it would be interesting to rate the earlier eps since it wasn't done when they first aired. (To make comparisons easier, I'm shamelessly borrowing Hugo Xiong's ratings system.)
I was actually surprised how well this ep held up; it was actually improved now that we know Jin's side of the story from ...IT. Yunjin turned in an amazing performance; there was a lot of character development; most of the cast was well utilized, especially the usually underused characters Sun, Jin, Michael, and Walt; it forwarded the island plot with the move to the caves; and it introduced one of the more interesting island mysteries (which has been completely ignored since then, but oh well).
7.5 a solid episode. it contained interesting and important character development, especially in light of the later epis, but I also have to rate it in light of other epis, and there are a few that blew me away or intrigued me more.