Windows 7 is good. But let's be honest, its got issues I didn't come across in Windows Vista - so much so I almost went back to Windows Vista on my Tablet.
1) The Common Feed list doesn't seem to always want to update after waking up in the mornings, and you have to tell it update. Pretty annoying bug when I've been checking my feeds in IE all day without noticing they've haven't updated since yesterday.
2) Pen flicks are broken in IE8 when using the new renderer /facepalm. No doubt this breaks it for people using touch input, as well as a digitiser on a Tablet. Not being able to scroll is a kind of major issue, especially as its going to get worse as more websites start rendering in IE8 mode not IE7.
Both issues were reported in the beta and both are still present. In comparison Windows Vista didn't have any issues that forced me to change my day to day behavior when using it.
As for subjective stuff, sure Windows 7 is faster, not on any of my machines which are all 2GB+ but yeah I guess its faster I can't really tell the difference but meh I'm sure someone can on their 1GB system. And still after 10 months I'm struggling to get used to the new Taskbar, I have to to show icons for a few days, then when I've got half a dozen explorer windows open I realise how much quicker it is when the icons have labels and aren't being combined (I do have the screen space down there - the system might as well use it).