I bought it a few weeks ago my friend works for microsoft....i love it, its soooo much better then vista, just think vista, but cleaned up faster,quicker, load times are faster, start up is faster, task bar is great, the upgrade will work just fine for you cause u can keep all your files....i went with the full version just to clean my computer. 7 takes some getting used to cause its got stuff that windows has never had before, i suggest u take time on Microsoft website to read the tutorials they teach alot about the os and when u know how to do stuff after that it makes it all that much better....i love the desk top gadgets lol even has a steam desk top gadget.....all in all 10/10 mac has good competition now, 7 is less of what we dont need and more of what we want....go buy it you wont be disappointed....speed of xp with the functionality of a mac....vista is garbage compared to windows 7 go with a full copy the upgrade is only good for 1 computer, full install is good for 2