FYI: While installing VS2017RC - Installing status hung at 65% AndroidNDK for over an hour, but eventually continued on - then again at 92% AndroidBuildSupport. I suspect the "Download Complete" bar lies and only counts downloading of install .exes and doesn't take into account any download those silent installers then have to do. Patience is key with any Visual Studio installer. Maybe start it before going to bed.
Anyone else care to share what they're seeing, like, dislike with the new IDE?