Unity is just annoying and frustrating! Has some nice features but...
Just spent a week using 12.04 and Cinnamon makes Ubuntu 12.04 much better for every day use.
Had several crashes with Cinnamon but Ubuntu does not accept the error messages and neither are they sent to Linux Mint so I wonder how these errors will get fixed.
Other problem with Cinnamon is that when trying to access an application on the menu it 'sticks' and doesn't respond for minutes. After it starts to work again it's fine for hours until next time it 'sticks'.
I found that Ubuntu 12.04 does need to be Rebooted every now and again, just like old Windows, to resolve slow performance after heavy use with many applications.
Like LMDE Xfce which has Tumblerd for updating file icons in Thunar, Ubuntu also also a similar stupid program that runs the processors at maximum especially when the processors are desperately needed by applications.
In Ubuntu 12.04 switching back and forth between Folder results in annoying waits for Folders to be reorganised. Not seen this with any other distribution where the Folders are instantly displayed.
Another issue with 12.04 is that if I set it to perform work over night, requiring about 60% use of the processors, sometimes in the morning I discovered no work done as Ubuntu 12.04 had Rebooted itself so it's not as stable as other distribution I use to do the same work like LMDE.
CPU = U9300, 4GB RAM, Intel GM45 Graphics @ resolution 1366x768, 128GB internal drive, 6TB external storage, Main OS = LMDE Xfce 64bit UP4. 2nd OS = LMDE Xfce 64bit UP4, Other installed OSs = Bodhi 1.4.0, Ubuntu 10.04 & 12.04, Mandriva & Windows.