This is the first episode of Lost that I really got tired of. Whereas Claire's episode had an interesting back story, this episode did not.
We see a minor glimpse of Kate's back story where she robs a bank over a trinket (which isn't explained until much later), but other than that, the entire episode focuses on the island storyline, which would be great if there was one. Unfortunately, the island plot is non-existant. Instead we watch for an hour as Sawyer and Kate find a case, they attempt to open it, and then Jack gets involved and opens the case. This entire episode can be summarized in the phrase "We needed more guns to get Ethan Rom". I feel like the gun reterieval portion of this could have been incorporated into the next episode, and the Kate bank robbery storyline could have been plugged into her other back story episode.
In any case, this is a very uneventful episode, and quite disappointing to watch. Luckily the rest of the season is much more fun.