[aroman]

You can call them whatever you want, but I don't need to write any migration scripts when I change the schema. Writing a migration script MIGHT be a good idea, depending on my setup, but I definitely don't NEED to.

I don't really know what you mean about the design being "broken", unless you mean that it's "different", in which case I would agree.

As for write confirmation, you have flexibility in that regard. You don't need to be checking getLastError for write confirmation[0], though if you wanted to use a broken pattern, you could.

[0] http://docs.mongodb.org/manual/core/write-concern/