new spot removal -- great but an ability to feather the edges under clone would be nice. I had to remove a drinking glass from a nice (nice for cloning) background, but the edges using clone were very obvious and I had to do a smaller heal just around the edges. Nice otherwise.
upright!! - great -- I tried it on a few images I had already adjusted and the result was improved in all cases, and on one I had not touched I have no idea how it figured out what to do, no good straight lines that I could find.
radial graduated -- don't know yet -- I will watch for an opportunity to use it
Overall I think its good and I don't mind $79 just for the two things I noted above.
I bought the upgrade. I played with a few shots last night. Our staff photographer turn me on to Lightroom 4 last year. He showed me a trick, I really like. In develop module, turn off the color, and use black and white mode first. I turned on show and shadow highlight clipping, adjust contrast, clarity, and what ever other adjustments that need to be done. Make it look as good as possible in the black and white mode, then when done, go back to color mode. I really like the way photos look in LR 5
Okay, my notes. One note, actually, beyond saying I am really liking it overall.
The application freezes, not always, but often enough to be annoying, when rotating image in crop mode. Doesn't seem to happen when rotating using manual lens correction. When app freezes, need to force quit and then restart the app. Using iMac and OS X 10.8.4.