I think Enterprise folks do not appreciate the flexibility afforded by NoSQL . For my startup I started off on PostGres SQL with Hibernate and it worked great

I think Enterprise folks do not appreciate the flexibility afforded by NoSQL . For my startup I started off on PostGres SQL with Hibernate and it worked great ... until we first met our paying customers. They needed data elements that I had not envisioned and so we ended up doing Schema updates.. again and again . Since we used ORM (hibernate), that also meant new hibernate code generation . After a while this became very tedious. I have a background in enterprise s/w development; we always lock down on most of our requirements before we start writing code. RDBMS is fantastic in this scenarios. In my startup, we build something light and show it to bunch of prospects and iterate. MongoDB fits this mode of s/w development for us. Sure there are gotchas and other issues but they have not affected us yet.