I'm playing around with Ubuntu 9.10 on my current/old PC while waiting to complete my new build. I already have XP Pro which I've used on this system for 3-4 years. I have noticed a few main differences: (See my signature for old PC specs) You all know XP so this is from the perspective of using Ubuntu 9.10:- Pro's Installation was simplest ever - no drivers needed for anything!! Loads 4 times faster (even including the login) at 1 min. Shuts down in 10 secs!! Seems more stable (don't ask me what I mean - it just does) Google Earth graphics much smoother when scrolling across streets - this surprised me! Wifi works so much simpler and more stable. Con's Seems sluggish in comparison Limited choice of web browsers Flash is very slow and youtube viewing is awful More CPU and memory hungry (could account for sluggish feel) Graphics can be very slow, especially 3D. Google Earth photos are erratic and often don't display. These comparisons are on a single core chip. I cannot wait to complete my new build and test out the 64-bit Ubuntu 10.04. I will be using that for the first month until I then get Windows 7 to dual-boot. What experiences do you have on your faster systems?