Very satisfied here - to the extent that this is probably the most positive experience I've had with a new version of any OS.
The MBP DVD read errors, accessing windows shares, shared printers problems mentioned above have not been evident here (4 machines so far, 2x G5, 17" MBP, brand new iMac). I use shared printers and smb networking all day, every day without issue.
So far, everything (and I DO mean everything) works - albeit I had to re-compile a CUPS printer driver for the iMac, but that's an Intel thing, not a Leopard thing. I'm a little taken aback, to tell the truth, as I think this is the first time ever.... *grin*
9.5 out of 10. It'd have the other .5 if it supported my old G4-400 that I use as a file server ;-)