"I am glad we didn’t have a learn some aliens language like Cypher to traverse and find patterns out of the relationships. It has a simple SQL like language to do the stuff we needed. This same was very difficult and painful to do using BigTable like DBMSs e.g. HyperTable and HBase. Obviously we are not talking about hundreds of petabytes of data here. While MongoDB was notorious about data lose, because of its late data flushing out to disk. So we tried CouchDB, but we very disappointed to see how we had to query data using its improperly implemented Map-Reduce querying feature. Neo4J is a good product to drain out your money and still keep you unsatisfied, due to its non-distributed nature. So we were left with OrientDB as the single and the best choice for our problems solution."