I had the RC2 build, then got Vista Ultimate through school. I love a lot of new features, such as the realtime taskbar icons, and the search being extremely powerful. It has a good clean feel to it, and for the most part I enjoyed it. The negatives however ended up out-weighing the positives for me. Instability and in some cases incompatibility with programs I work from. Signed drivers not being readily available. 64-Bit edition having no wireless adapter drivers (at the time) I will eventually switch back over, but with XP SP3 coming out, I don't imagine it will be anytime soon.