The main things that helped were: very clean and simple APIs, set of Java tools we could use for it, very, very easy to setup up, good GUI administration tools. All the things you perhaps wouldn’t get if you’d look to an open source solution (nb: my emphasis).
You’d perhaps be amazed of what you can find in open source solutions like say Riak or this newcomer. No need to bash open source tools in general.
Original title and link: Choosing Oracle NoSQL Database Over… Open Source ( ©myNoSQL)