I'm sure mongo has some good use cases but so far at my company we have evaluated and tried mongo for a few things. Never really made it very far. This article seems kind of petty to me honestly. This is the same mongoDB that by default left databases open and god knows how many instances out there are hacked.

The only thing i've ever gotten with mongo is a bunch of marketing BS honestly. We have worked with some of their sales people and technical people to try and figure solutions out. It was 100% marketing BS. no thanks for me, best of luck for you guys.