Well, have had Lion installed since it's release. Although I do like the changes, and enhancements, I'm also pretty disappointed in the following: Instability when using shared folders on a Windows Network. After coming out of sleep, the folders are unavailable, and Finder becomes unresponsive. Various interface quirks, and refreshes. While using Safari, Mail, iCal, and sometimes Finder odd lines appear here/there when moving. Spinning Beachball at random times, for no reason. Unresponsive at times, especially when using Mission Control. Sound icon on Menu bar is always grayed out after a reboot. Only fix is to put in headphones, and take them out. There's a few other oddities here/there, but not worth mentioning. Like I said, I DO like Lion. However, I am a little disappointed with the overall quality of it.