Unity was buggy in the beginning, but it has been usable ever since 12.04 LTS. I'm typing this on a MacBook that I use for work and when I'm in OS X, I miss Unity.
The screen is uncluttered, the shortcuts are great, the dashboard is great, the various special effects are finally not nauseating, the only thing bothering me is that I can't move that launcher on the right side, but lack of customization is a problem with Gnome in general.
The screen is uncluttered, the shortcuts are great, the dashboard is great, the various special effects are finally not nauseating, the only thing bothering me is that I can't move that launcher on the right side, but lack of customization is a problem with Gnome in general.