Yeah, the ep was pretty amazing, though not as much as S2's finale. It had me on the edge of my seat though, especially the last 10 minutes. O__O I'll just copy and paste some of my reaction to it from my journal to here:
[spoiler]Okay, guess I'll start with dude, this Kate-flashback made me not like her even more. She was growing on me after rewatching Season 1 a few times, but WTF, you damn bitch, why the hell are going to marry a guy who's a cop knowing that you're never going to be able to settle down and he's GOING to find out about you being a fugitive. Then you drug him and abandon him, great. That's what I hate about her, she just uses everybody. I understand why she did what she did (as her crime) but deal with the damn consequences, don't marry a guy under a total fucking lie.
I actually felt bad for Jack in this episode ....Yes, you read that right.

Even after being a douchebag for all of last season, the whole thing with Kate and Sawyer... I mean, she fucking cock-teased him for two seasons then suddenly decides OMG I love Sawyer, and then he has to watch them make out on camera. And wow, talk about sudden ball-growth (even though he still had a few emo moments and temper tantrums, WOULDN'T BE WEDNESDAY WITHOUT THEM. XD;;) ... that line he said to Ben was like, total pwnage. ("At least you won't be disappointed for long." OH SNAPS BIATCH!) Dang. And the scene with him and Kate was like, the only good acting I've ever seen Matthew and Evangeline actually do on the show. -_- It was good.
Alex's overacting made me LMAO.
The best part of the whole Skate sex thing was so the fact that Ben was totally watching them on camera. So kinkay. I sense 21,842 fanfics coming in the Ben fan community I'm in. >P
THEY TOTALLY FOOLED ME INTO THINKING THEY WERE GOING TO KILL SAWYER in the last 10 minutes. >:((((( They had the sad music going, and all that, and my friend who watched it with me was amused by me sitting on the couch screaming "nooo" and squirming and pulling my hair out. So much freakin' tension. And then Jack messed with Ben's kidney. OMGGGWTTTTTTFFFFF. So much anger. But he did save Sawyer. So I can't decide whether or not I love or hate Jack for this episode. >___< But yeah, if they killed Eko and Sawyer back to back, they'd have soooooo many angry fangirls on their hands, lol.
At the end I just screamed REALLY loudly. 13 weeks of not knowing whether Ben is going to die or not?!??!!? *SLAMS HEAD INTO WALL* ;__________;[/spoiler]
Personally as far as the KateJackSawyer triangle I couldn't really give a shit. That was old as soon as it first began. =P