I've been using the file called Windu.exe to list the size of any folder (I downloaded it long time ago and it works with Win98, Win2k and XP).
You can download it here http://www.gfeeney.com/ssp98ws2/software/
You have to make a shortcut refers to Windu.exe (I named its shortcut as Space Usage) in <b><font color=red>Sendto</b></font color=red> folder. If you want to know how much space of any folder used, right-click on that folder and send to Windu. It will list how much space that folder is used.
Good or Bad have no meaning at all, depends on what your point of view is.