I think that you would find MongoDB to work nicely for you ... especially with the need for rich queries (which assumes, on my part, that you have more complex

I think that you would find MongoDB to work nicely for you ... especially with the need for rich queries (which assumes, on my part, that you have more complex data needs, documents, etc.). With all due respect to the Kiip engineering team, this wasn't a strong case for using Riak over MongoDB ... but rather the general pain that a engineering team feels when horizontally scaling in the cloud.