@estherschindler - Mongo DB was shiny and new. We had just moved into a new building and the boss wanted am interactive "get to know the agency" game for all the customers at the party showing off our new digs. Our developer who was always chasing the hottest new technology decided to use mongo as the backend data source not realizing it had serious performance limitations when doing things like... Summing up and sorting scores. Halfway through the party he did an emergency refactor to MSSQL.