I installed Mac OS X Lion today. It is available in the Mac App Store for 29 USD. That is pretty cheap. And pretty good!
The installation is straight forward. After 15min and a short reboot it was installed.
The first thing I realized after the reboot, the scroll direction is swapped. It is “natural”. The content tracks finger movement.
The design is very clean. Just some small changes. One of the biggest Features is Mission Control. That is pretty cool. It shows you all your spaces and the Dashboard.
Another very strong Feature is the Launchpad. It shows you your Mac Apps in a way like you would see it on your iPhone. I like this. Very clean.
And another cool Feature are full screen apps. Some Apps, for example iPhoto, you can start in Fullscreen Mode. That is very useful.
Some of the default Mac Apps are also changed. The “Mail” App is much better now. It looks a little bit more like Outlook. But the really cool improvement is the mail grouping function. It hides all redundant content from the mail history.