Still looking to chat with some folks internally about this, but just one thing: `toFixed` is indeed necessary here. If your max value doesn't divide neatly for each axis label you can get long floats. One example is a brand new subreddit:

![image](https://cloud.githubusercontent.com/assets/285920/3069205/68fe1226-e298-11e3-847e-fd03f10da805.png)