I've just upgraded to Lion and I've got to say it's really really speedy. However, I've got a real problem with not being able to use Spaces and Exposé the way I could on Snow Leopard. Particularly being able to drag who desktops around, and use Exposé to show all applications open on a desktop (not just windows for one application). It's really weird as it looks like you should be able to drop things around onto the gray side bits of Mission Control but that's not possible (a step back from how intuitive everything felt on SL). The same goes for not being able to use four fingers swiping up to see the desktop and not being able to use gestures in Finder. It feels like I have to use Mission Control the way the designers of Lion want, instead of set it up how I want like I could with SL. Do you think there's any chance they'll bring back the options of Spaces in a later release? I'm seriously considering going back to SL in the meantime, even though I'll miss the speediness of Safari from Lion.