Yes I have tried it.
It does run smoother than Vista I think, I don't have any crazy time trials or anything just a feeling I get. Just seems to run smoother in opening folders, applications, etc, but it wasn't like Vista was pull your hair out slow, it was fine.
I have already deleted the partition Windows 7 was on, so..
But yeah I don't really see it as a big improvement (although I admit I didn't mess with many of the "new" features).
I like Vista, of course my Vista is heavily modified. I removed UAC, defender, all the pop up security shit. I mean Vista boots up in under two minutes for me so yeah. After my modifying Vista it's basically just like a sexy XP to me, it feels the same.
Oh and I have a dock, like OS X, for Vista also, so I don't see what's so cool about the new taskbar in Windows 7. It's called rocketdock if you guys are interested.
RocketDock - About RocketDock
Anyway about the techie stuff. I was just saying that to make sure people don't waste their time downloading like 4 gigs (or however large it is) to find out it's a .iso and they can't run it like an .exe.
It comes on an .iso file, if you don't know what an .iso is then I would suggest that you do not download it and try to install it.
You basically have to burn the .iso onto a disc with software like daemon tools or alcohol %120, etc. Then make a partition to install Windows 7 on, reboot, change the booting order, and then install it. Not many people know how to do that or so I would assume.