Well first impressions. In a nutshell – unbelievably shite!

• The default desktop has to go – far too distracting – too many bright
  white lights.
• Then there is the transparency of the menu bar at the top of the
  screen. Blech.
• When you alt-tab away from Safari, the chrome on Safari actually gets
  lighter. When you alt-tab back into it, it gets so dark that it is
  barely legible.
• Stripes in Finder
• No Java 6.
• Firewall settings were rooted.
• One good thing – when you use apple-shift-4 to indicate area of screen
  you want to copy, you get size indicators.

Maybe I have just been using Mac too long now and am getting set in
my ways.

Anyway, it is too bleeding edge for me. I reverted back to Tiger
from the full SuperDuper! clone I made just before I did the
upgrade.