Its a resource hog compared to XP, and i have ran into shoddy wifi card support, real shoddy printer support, haven't tested many applications yet, but overall I am going to wait to install my copy. I am getting a free full version of the Ultimate edition since I work IT and MS wants me to use their products. They give us free crap all the time so we will buy an enterprise license of it.
XP for me for now.