What are the pros and cons of DynamoDB with respect to other NoSQL databases?

Question

We use MongoDB database add-on on Heroku for our SaaS product. Now that Amazon launched DynamoDB, a cloud database service, I was wondering how that changes the NoSQL offerings

Answer 1

Using MongoDB through an add-on for Heroku effectively turns MongoDB into a SaaS product as well.

In reality one would be comparing whatever service a chosen provider has compared to what Amazon can offer instead of comparing one persistance solution to another.

This is very hard to do. Each provider will have varying levels of service at different price points and one could consider the option of running it on their own hardware locally for development purposes a welcome option.