Keen.io provides good analytics infrastructure for a large organization
What do you like best?
Easy to begin streaming data, analyzing it, and visualizing it using very clearly documented APIs. I've used it both for internal projects and for end user projects, and I've been pleasantly surprised by its stability and feature density.
What do you dislike?
When you're building solutions intended to be used by third parties, you cannot rate limit their usage of the API. Since costs are primarily driven by how much data you compute, this makes it hard to price your service in advance. Recent changes to their pricing model make the base price even to have a single customer on a Keen.io backed SaaS at least several hundred dollars per month, so ensure what you're building is priced accordingly.
What problems are you solving with the product? What benefits have you realized?
We wanted to provide eCommerce related dashboards to end users of our software, Drupal Commerce. Using Keen IO we were able to quickly index not just denormalized transaction data but also the essential traffic related data needed to track conversion rates, campaign effectiveness, and more. We obviously benefit from Keen's scalability, but we've also taken full advantage of rich features both in their streaming and in their visualization APIs.