[imtringued]

Instead of nebulous terms like NoSQL you should instead just look at the damn features because these concepts are orthogonal. MongoDB has transaction isolation on the document level instead of the database level. If you can store everything in a single document then it doesn't matter. If you can't then use a database that supports database level transactions. It doesn't matter if it's a NoSQL or RDBMS database.

I feel a lot of people know that typical nosql databases (without database level transactions) are not suitable for their problem but they don't know why and then just think NoSQL is always bad and RDBMS are always better because the NoSQL databases are intended to be used for different problems.