I have a late 2008 unibody Macbook running Ubuntu + Gnome3 (no Unity). Almost everything worked without configuring. Brightness control required one line to xorg.conf and Airplay required installation of one Pulseaudio module.
I really like Gnome 3. It's much faster than Lion in that machine (4 GB of RAM, SSD), the battery lasts the same in my normal use as in Lion, the user interface fits for my freetime use, the visuals are simple and pretty and best of all: Nvidia has much better drivers for Linux than for OSX, so I'm actually able to play Minecraft without any hiccups.
I really like Gnome 3. It's much faster than Lion in that machine (4 GB of RAM, SSD), the battery lasts the same in my normal use as in Lion, the user interface fits for my freetime use, the visuals are simple and pretty and best of all: Nvidia has much better drivers for Linux than for OSX, so I'm actually able to play Minecraft without any hiccups.