Terrible. It's slow and bloated. Windows 98 is far less bloated than it or even XP. I tried installing it once and it crashed my computer and fried my motherboard. My friend actually died from installing it.
It was the last sentence that got me 😛
MS (finally) did right with Vista 2. It runs very well on modern machine and even ok on some old computers I fixed for my friends and family. By old i mean 2003-2005 and 768 MB or RAM, though the aero is turned down.