I have the DP4 of Lion so here is my take: What I Like: Animations and transitions - very nice and I like how there is the bouncing effect. Looks pretty polished. Full Screen - I can see myself using this option a lot. Good use of my MBA 11's smaller real estate. What I Don't Buy: The Gestures - They changed the scrolling and the gestures I am used to. Scrolling is confusing now but I am getting used to it. I hate how they got rid of 4 fingers down for Expose (now Mission Control) and 4 fingers up to move everything out of the way. Mission Control - Expose was not broken, I don't get why they fixed it. Mission Control is too cluttered for me and too complex compared to Expose which was amazing. Launch Pad - Eh its just eye candy for me. I haven't used it. The dock has all the apps I use...and its always visible anyway so whats the point of Launch Pad? I'll add more soon!