The new features look great but it's slow as heck on my computer. Previous versions of Blender opened in seconds, this one takes up to 40 seconds to open and every bit of the interface is laggy. I don't like the fact that they seem to have gotten rid of zip downloads too - all I was able to find was the .msi installer.

Also - how lazy have I become, that 40 seconds seems like forever. My first PC back in the early 80's could take 3-4 minutes to start up, now 40 seconds is frustrating. :)