Mongodb is just as good or better than any other database out there.

Coinbase uses MongoDB, Barclays uses MongoDB, BBVA uses MongoDB, Capital One uses MongoDB. Charles Schwab uses MongoDB. FICO uses MongoDB. Goldman Sachs uses MongoDB. HSBC uses MongoDB. Intuit uses MongoDB. Uk Inland Revenue uses MongoDB. UK Dept of Work and Pensions uses MongoDB. What more proof do you need that MongoDB can stand toe to toe with any RDMS.