Yes, I took up the £30 student deal (downloaded only) and loaded it onto my Macbook, why well I wanted to see how good it was as I never gave vista a look after such negative reviews from users so XP it was. I only really needed it for one or two applications, which are specific to Windows.
The install was done in less than 40 minutes which was fast and on first look Windows 7 had me in a state of wow, things have improved greatly and I mean greatly. It's slicker, faster and more intuitive so it seems that they've taken a leaf out of Apple's book!! A couple of nice touches are the fact that you can 'pin' applications to the task bar and review them by holding your mouse over them. The broadband/Wi-Fi set up was the simplest I've come across and yes it just works. I loaded safari for windows and its seems faster than under OSX.
The offer finishes in January, so snap it up as the price at Amazon is a lot more but remember it's download only but you can turn it into a self-loading disc, plenty of info on that floating about.
I think Microsoft have actually got things back on track and should get those XP users to switch to Windows 7 quickly and they won't be disappointed.
However you may be quite happy with your existing version of XP or Vista but remember that Microsoft will stop supporting XP in a few years.
Oh before you do upgrade check to make sure you have the minimum system requirements needed to run Windows 7.
A fully licensed copy available for £30 who's complaining not me.