I'll echo what another reviewer said with this being a poorly written episode. The vast majority of the dialogue felt out of character and it just came off as too thrown together.
What I did like was the re-emergence of a Lexie and Sloan relationship. These are two of the best personalities on the show and pairing them up always results in top-notch scenes. Cannot wait to see where things go from here. Izzie's rant about sex was also hilarious, but I am pleading with Grey's Anatomy to end this ridiculous storyline with Denny.
What I didn't like was the Meredith and Christina bickering, and the possibility of another Callie lesbian affair. Sadie was actually less annoying this week than before and Melissa George is a decent actress, but hopefully they don't jump the shark with yet another character.