Hi Joachim,
As a matter of fact I did download the free version and played with it for a bit, I really do like it.
I haven't had a chance yet to dive into my windows folder sizes and compare the 2, I'll post something when I get the chance.
What I have noticed is that the disk usage section of the new control panel, "Settings" I guess they call it, is useless.
Settings/System/Storage is it's GUI path
If you go down to "view storage used on other drives"
I keep "My Documents" on my D drive it says that I have 4.41 gigs used, even windows explorer says it's 203 gigs
Even if I subtract out my pictures music and video folders there is still over 7 gigs left, I can't even find a single folder that's 4.41 gigs on the drive!
That issue probably deserves it's own thread (maybe it has one)
Have a great week