I seem to have been able to use it correctly. In fact, I ran a cluster for years in production without any issues. I know of several other groups that have used

I seem to have been able to use it correctly. In fact, I ran a cluster for years in production without any issues. I know of several other groups that have used it successfully as well. As far as I can tell, a lot of people assumed it worked like a SQL database. It doesn't, which disappointed them. I'll even admit that some of the original defaults like the write concerns didn't really make sense as defaults. But that was all in the introductory documentation. Major subsystems like databases deserve at least a skim of the documentation if not a full read; if not up front then at least before putting them into production.