It's still going well.
I have added a huge folder from my Drobo 5N to Zoolz's Cold Storage capability. I'm now sitting at just over 400GB of my 1TB capacity.
I still haven't played with the Instant Vault storage.
I occasionally exercise Zoolz's restore. My most recent test took about 4 hours to restore. That was for a single file. I don't expect that will grow linearly for a larger set of files.
My next restore test will be for a full folder.
Remember that your backups are no good if they won't restore.
If you've turned on Controlled Folder Access, you need to add Zoolz.exe and ZoolzRestore.exe from C:\Program Files\Genie9\Zoolz2\,