1) The installation is difficult for large forums. Where the installer adds columns to the xf_post table timed out on me, I worked around it by doing it manually and editing the install file.
2) I set our Admin group to be able to view edits (both permissions), then our general usergroup with only view that it has been edited, and I (Admin) lost the ability to view the edits.
Past that, thank you, we've needed this for a while.