Superheroes have always been an urban breed. "On a roof, where do you think?" is what they are normally saying into their cellphones. More importantly, vivid urban settings have always been part of superhero comics. Superhero RPGs have had the same urban elements in presenting their settings. Resolute's Echo City is meant to be a street-level supers setting, but it requires that you know what that means and what you want out of it. What you get from this very basic presentation will not take you far without a knowledge of other comics and a clear picture of what you want from your campaign. That said, it's a great starting place.
In only 8 pages (in the printer-friendly version), you get a quick geographic rundown, a clip of history, several evil factions, a short introductory adventure, and a few heroes and villains to populate Echo City with.
First of all, I love the name "Echo City".
Secondly, the introductory adventure is something that more settings need to have. Not only does this help get across the city to players who are established in the setting, but it also gets across to the GM what the setting is about. In the adventure, the team is tracking a bad guy to Echo City, and they discover he (and the police) are involved in the plans of a larger mastermind. It's straightforward and gets the point across about the corruption of the city in a fun and immediate way. Playing an introductory adventure is far more fun and interesting than passing around supplementary material.
Finally, the two pages of heroes and villains give a good idea of what sorts of characters would be "at home" in Echo City. Resolute has an advantage over more complicated systems here, since a character writeup can easily be presented in only a few lines.
On the downside, there are some awkward sentences and grammar, but more importantly, the introductory material and geographic material don't give a clear picture of what the city is supposed to be about, or clear ideas for where superheroes should go or what they should do. I get that the city is corrupt, but I don't know how that corruption works or what it looks like for the suffering people of Echo City. The only reason I know what a game in a corrupt superhero city should be like is because I've played them before and thought about them a lot. Attention to how to use the material, along with explanation, would definitely improve this supplement.
That said, there's a printer-friendly version included and if you want a free star from Jason, include a printer-friendly version or do something with the fact that this is an electronic version of your material. It's well-laid out and easy to read.