Rhea did a fantastic job directing that episode, I always love the creative angles and shooting from odd spots scenes.
Spoilers...
That Jimmy doubling for Howard scene was so hilarious to see, the whole setup and execution with the sign moving was just vintage BCS.
Gus having that crazy level of surveillance gives a bit of background I guess to when Walter White comes to Gus's house to shoot him and he gets a phone call "Go home, Walter".
Another two BB characters - Wendy and Spooge.
Mike and Kim meeting for the first time, that was such a great scene.
I always love these types of episodes, it's really what makes the show great IMO.