Found a little quirk with the installer(s) as well:
Patch installer: If you run out of disk space on the drive where %TEMP% (ie: C:\Users\Thomas\AppData\Local\Temp) is pointing the installer will fail with a not very specific error message (screenshot 1).
Full installer: Even "worse", it just freezes without any (obvious) message what so ever (screenshot 2).
Edit: After reviewing the 2nd screenshot I now notice that the text changed to "Installation aborted - Setup was not completed successfully", but that's (probably, and in my case obviously) easily missed.