I just ripped a small collection (only ~200 discs), and I encountered all of the problems that have been complained about in this thread. I still used Musicbrainz, because it was easier for me to double-check and fix the entries in their DB than to manually type all the data myself.

When bandcamp releases were available but nothing was in the database, I found it quick and simple to copy+paste the track listing into MB and create a new release. Combining it with the TOC I'd already been searching for, I got perfect rips every time without much issue.

Even with a significant amount of time double checking and fixing the metadata, I consider it a good use of time. I was not simply ripping my CDs, I was helping maintain the historical record.