I'm not trying to be contrarian, but it's weird how different people can have nearly opposite opinions of the same thing--is it really performing that much differently on my computer, or is it just a matter of taste?
I'm totally satisfied, but in particular I actually prefer the new dock--for my side-mounted dock with lots of stuff in it, the new "shadow" 2D version looks considerably better, and is easier to use, than the previous one. The menu bar hasn't bugged me in the slightest, either, though I admit I have a bland background pic.
Airport, similarly, has actually worked better for me under Leopard than Tiger--rock solid connections, and behaves better when I go out of of range of a network I was connected to. I haven't had a single KP, apps are at least as stable as before, and I haven't needed to reboot other than for updates/driver installs (current uptime 7 days).
Likewise, I keep hearing people complain about Mail stability, but it has run fine for me with several POP accounts, and I like the tweaks it's received (search, in particular, works much better).
It even feels faster. That could be psychological, but it's certainly not any slower for what I'm doing. Heck, with an XP VM running in the previous version of Paralles, Photoshop PS3, Excel and Word (Rosetta), a couple of text editors, three browsers, and an ANCIENT game (Spaceward Ho) I'm surprised it runs as smoothly as it does with only 2GB of RAM on a 1st gen MBP.
And incidentally, I agree that Quicklook turned out to be the killer "above the hood" feature, and I'd have thought it useless. For me though the actual killer feature has been the VASTLY improved Finder integration with servers, and the built-in ARD client.
