Mine kept spinning for a good 45 min yesterday. No progress bar, no nothing just the spiny shit. I was really pissed and though it was totally f-ed. Somehow it completed though eventually so I was really happy about that. Still really unhappy that they messed around with the UI for no reason whatsoever, and that some applications seem to be less responsive and crash more often. I risked totally corrupting my OS to get a bunch of features I didn't want and an incorporation point that was really inconvenient for me. I'm going to accept a few more patches to fix the stability issues but once its stable again im definitely going to put my WIFI connection into metered mode to prevent future major updates from being pushed before all the bugs have been worked out.