Overall working very well! MBP5,2 completely usable with BS now.
I've seen a problem when enabling transparency reduction: then the left part of the menu bar is not updated correctly when changing the foreground window.
Once I shut down with transparency disabled, then after booting the left part of menu bar remained blank so couldn't do much from there on. Then I remembered jackluke's reducetransparency fix command which he provided long ago
#2,275 .
Changed the setting in there from true to false, applied, rebooted - that was the rescue.
Some small graphics glitches, like not displayed symbols in some system settings, really don't hurt.