Doesn’t work

Looks good up to the point it simply fails to complete an import operation. I tried twice, wiped the database and site files and started from fresh install, added the plugin, ran the import. Both times the same thing happens, it just sits there spinning saying “Done preparing blogs…” with a “Stop Import!” button. This never goes away, and the button does not work. Looking at the database I can see it did import data as the user accounts are there. However, if you hit the site it’s broken (page isn’t working, unable to handle request).
Additionally, I did a manual backup of the old site directory before all this, and it’s 5gb. The archive that this plugin makes is only 288mb. It’s quite clear that it’s NOT backing up the entire site, just some slim default portion and none of the custom files. It’s my conclusion that the import fails because vast portions of the site were not exported properly, so the restore is broken let alone missing most of the site.