I did the upgrade, at the end it wanted to reboot my computer (Windows 7 64-bit). I closed everything and said yes, but after getting to the very end of the shutdown it just went into a loop ("Shutting Down Computer"). I gave it 10 minutes and hit the reset button. It did come back up without a problem and everything seems fine but no software should do that.
I tried a half dozen iLok products and everything seemed to work. It's hard to say for sure but they do seem to open faster, so there may be some upside to this.
I'm not so sure about having iLok check for updates and autoupgrade itself so I turned that off. Looks like it will check daily or weekly for you. But I'm not sure I want that nor is it clear how it will handle it when an update is found.