If the barcode feature works for everything pressed in the barcode era, it could be a winner to get that database going. I found their core app too clunky and obstructive especially if you had to add titles which had to be approved by the moderators.
I went with Music Collectorz and CLZ Barry combo but have yet to start this job. In the end, there is no quick way to catalogue but starting from Discogs and exporting a dataset could be a reasonable strategy?