Lion not ready for prime time
I waited a month or two before Lion was released before installing it on my Macbook Pro. I wanted to give Apple enough time to work out the initial bugs that turned up. But after using Lion for a few weeks, it seems to me this OS isn't ready. Generally, it is more cumbersome than Snow Leopard. Things that used to take one operation now take two or three. The screen motion in browsers, for example, now set so that the fingers on the trackpad move the page rather than the cursor. This switich seems arbitrary. In practice it means that you can't select/highlight beyond the end of a page, because the page no longer moves up rather than down. You must select to the bottom of the page, stop, move the page up, press shift, and continue to highlight.
For some reason the browser address bar no longer shows http://. This means it's harder to copy and store full URLs.
The most difficult problem with Lion appears to be a difficulty controlling the active focus, i.e. moving from one window to another. In Snow Leopard and previous versions of OSX, you just clicked in a window to make it active. In Lion, sometimes this works, and sometimes it doesn't.
The most problematic Mac program in Lion is Preview, which handles images and documents. Preview in Lion no longer shows all the separate pages of a document in the sidebar. You have to page through the doc in the main window to move through it, rather than clicking on a page in the side bar. Closing documents in Preview often doesn't close them, so they keep showing up in the sidebar. It's often difficult to move from one document to another by clicking on documents in the sidebar.
Overall, I wish I hadn't upgraded from Snow Leopard, and I hope Apple fixes OSX Lion really fast. If any reader has advice about improving the problems mentioned above, please reply.
MacBook Pro, Mac OS X (10.7.2)
