Share for review is completely useless and does not work in the latest release on osX Tahoe. I can see the comments from clients listed in the panel, however they are not marked in the document and when clicked on them it does not show you where. So i have to open the comments in a browser (and its buggy even there!!!) and locate the reviews manuall.y. Also, when i update documents (also in AI), i always get a red popup saying that the file update has failed (although it does not fail and the changes are updated). Anyway, a horribly broken feature right now and im losing my mind over it.