Using the current Beta and find it already more beautiful, consistent and stable than latest Ubuntu with Unity. You guys rock!
The Luna (still in development) OS works well and very fast. There's only one downside to it: you can't minimize windows, so you can't multitask. Switching between windows just doesn't work. Devs say: You don't need to minimize windows, just close them. I don't think that it is handy to close and reopen for example a office programme every time.
Elementary OS is a (simple) remaster of Ubuntu 12.04 (Precise Pangolin). Shouldn't that be mentioned on the Summary page?
Beautiful but a lot of issues to resolve. For instance conky disappears, windows cannot be clicked, totally freezes with only keyboard access etc.