DynamoDB vs MongoDB NoSQL

I recently migrated my MongoDB to DynamoDB, and write 3 blogs to share some experience and data about performance, cost.

Migrate from MongoDB to AWS DynamoDB + SimpleDB

7 Reasons You Should Use MongoDB over DynamoDB

3 Reasons You Should Use DynamoDB over MongoDB

Ref:
http://stackoverflow.com/questions/17931073/dynamodb-vs-mongodb-nosql