So, I've always been pretty critical of Aperture. I have used both LR and Aperture, and always preferred LR for two reasons (besides performance): Curves editing and split-toning. With Aperture 2.0, the app is now blazing fast and I love it. There is still no curves editing, but I've been told Levels can get you very similar adjustments. Well, I've been playing around with it and I just can't figure out how they work. What are the differences between adjusting the arrows on the top and bottom, or adding more of those arrows? Any explanation would be REALLY appreciated as I would like to switch over to Aperture (how about a split-toning adjustment tool in Aperture 2.5? )