Testing Ubuntu 10.04 (Lucid Lynx) Alpha 3.

Today I've fully upgraded my laptop which had Ubuntu 9.10 on it, to Ubuntu 10.04 Lucid Lynx. The whole upgrade process took some time, but the results are impressive. So, what I've observed in the following 30 mins after the installation:

• The OS moves significantly faster than before
• Notification problems from the previous Alpha release were resolved
• Possible bug with the sound (or only with its icon)
  
• Gwibber added (application, Twitter client)
• Some changes in "Disk Utility" (interface)
• Many programs have up-to-date versions
• Human theme is pretty changed (most obvious changes are related to the panel)
• 2 Completely NEW themes included; one is called "Radiance", and the other one is called "Ambiance"

About the themes. Ubuntu now has on all its themes the buttons for the windows on left (minimize, maximize and close), pretty much like Mac OS X. The new "Radiance" theme is completely inspirited from Mac OS X (wallpaper, colours, buttons, etc), and nobody can tell me that it isn't.

But they are differently placed. They are in the following order: maximize-minimize-close, order which is not present on any other OS. This seemed a little strange, but it didn't create confusion for me. Many Linux users declared that they don't agree with these new buttons, but if you want my opinion, I really like it. Update: the buttons are now placed like in the Mac OS X: close-minimize-maximize.

The other new theme called "Ambiance" is exactly the same with "Radiance", except that it has dark colours. I'm currently really tired, and I observed that "Ambiance" is really relaxing, compared to "Radiance" which has very bright colours and it's pretty unpleasant now. Below is the "Ambiance".
The OS is fully functional, like the previous version, and it is extremely stable (since it's an Alpha version, I was expecting to be pretty unstable). It offers quite a similar experience (compared to 9.10), except that is more responsive and moves faster.