Questions: local development

I see the (great!) [developer guide](https://github.com/GoogleChrome/OriginTrials/blob/gh-pages/developer-guide.md#how-can-i-experiment-with-the-new-feature-locally) suggests two ways to experiment with a new feature locally.
`You can get started experimenting with the new feature on localhost either by flipping the flag locally or requesting an origin trials token for localhost.`

Two questions:
1. What are pros and cons of the two ways? When would you recommend each approach? What about third-party origin trials, does this change anything?
Things I could think of:
* Benefits of `localhost` tokens over flags:
* Token can be shared across a team. No need to replace the token when checking out the code of a small prototype (one gotcha though: port- and protocol-dependent)
* No need to restart the browser / turn flags on and off
* Work across Chrome and Edge without extra setup
* Benefits of flags over tokens:
* Faster to set up
* Easier to troubleshoot / No troubleshooting: "if a flag is in chrome://flags and I activate it, the feature will be on" (vs.: if I'm using an expired flag, I'll need to troubleshoot this).

2. Do you think it would be useful to add a brief "When to use flags and when to use a localhost token for local development" in the developer guide under [how-can-i-experiment-with-the-new-feature-locally](https://github.com/GoogleChrome/OriginTrials/blob/gh-pages/developer-guide.md#how-can-i-experiment-with-the-new-feature-locally)? Or to highlight with a one-liner the one benefit of each approach?