This is a very nice implementation. I like hosted solutions like Optimizely, but sometimes it is important to be able to do this in our own environment.

I love the view helpers and the ability to keep the winner without having to modify everything again to implement it. Very nice mailer support. Also, you sold it to me with the configuration approach, way to go!

Few questions:

- What about route A/B test support: Use case will be I want to show a totally different experience based on routes (2 landing pages) and be able to track it.

- If I want to condition block A & B on a view (or render partials), can I use the apporach based on the value the helper is going to return?

- What do I need to do to extend the dashboard and library? Maybe some documentation about this could be handy. Maybe decorators or some view helpers to build my own?

Keep it up!

Looks great. The documentation looks good as well as the feature set. I'm surprised there aren't more popular gems like this. I'm guessing because of products already in the field?