[drorweiss]

Couldn't agree more.

I've worked for 15 years with relational databases and for the recent 6 months with mongodb on my startup. For me, the agility of not having to define my data in advance, and "work" so much to explain the DBMS how my schema should behave is no less than a game changer in my ability to build the MVP quickly. I just can't imagine having to invest all the labor in having to model everything I did with a normalized database and ORM.

[Malshandir]

Really? Mongo is for me not a database. And I worked like you 15 years with RDBMS and a year with mongo. Mongo has no security. Especially the Mongo Cluster Solution makes it so easy to steal and manipulate datas without notice. Everyone who has access to the server can enter the database. Implemented "security" could be turned off with a restart.

And nowadays it is so easy in a datamodel in a RDBMS to make changes. It is high flexible too.

But another worst thing in Mongo is the performance at complex queries. It is a nice bin for thinks nobody needs or to put documents in but that's it with Mongo.