Upgrade 5 test machines here, not had any driver problems, and only 1 PC had any issues with applications.
When you download the upgrade you get the advisor that will scan for any compatibility issues so you'll get a heads up.
No crashing on any of the machines, no blue screen, seems a little quicker if anything.
The new start bar takes a bit of getting used to, but once you start to customise it a little, it becomes a great starting point.
A couple of nice features that have made our lives easier:
We have dual screen monitors and love the ability to span the desktop background and the task bar across the screens.
Especially to have the object on either screen one or two dock to the relevant task bar, very useful.
The new Remote Desktop connection App for the "Metro interface" allows multiple connections and the ability to easily cycle through them, its made managing servers from them much easier.
Also the built in support for ISO mounting, again very useful and seamless, no mounting ISOs to a drive then navigating to the drive, just simply double click on the ISO and they automount and you advance a screen and enter in the root folder of the ISO. Much quicker.
Somewhat useful, but very cool.. the new GUI for copying files, it gives a graph of the copy process and seems to be more accurate in its calculations. At least it doesn't seem to mention days or weeks anymore!!
Also the transfer speeds seem a tiny bit faster, and more stable.
Also worth noticing the payment / download and upgrade process was very smooth, I was expecting it to be harder. We got the copies for 24.99 (
downloadable upgrade only - 2.2Gb) Here is the link for anyone interested.
Overall our experience has been a good one, these have been our easiest purchase and upgrades of any OS (including Apple!) I wonder though if we were just lucky as this is not very Microsoft like!!!!
But so far so good, and credit where credit is due, MS appear to have done a fairly good job.