Pros :
- Better power consumption for laptop users
- Most of the packages are already pre installed
- Built in some firefox plugins
- Can detect secondary display automatically. Which means, I don't have to change my screen resolution everytime I want to project my screen through projector
- Pidgin 2.2.1 Multi Messenger is now pre-installed
- Can read and write to NTFS partition
Cons :
- Can't install msttcorefonts which is required for IBM 5250 emulator to run (I am currently researching about ubuntu-restricted-extras package and will get back shortly for the result)
- Can't set anything for Compiz. Unlike Beryl, the visual effect is very limited to wobbly windows, snap to edges, transparent title bar and maximize / minimize / close window animation
Overall, it's still the same good Ubuntu, with more power and features. But please note that these pros and cons are the ones that I found within 2 hours of usage. You can find more new features floating around the web and within the Ubuntu website itself