The WebKit engine drives both Safari and Google Chrome and there have been many spin-off browsers attempting to harness its super fast rendering.
Sunrise is one of those although it's mainly aimed at developers who need a bit more control and information about how their websites are loading. As you'd expect, pages load very quickly and the immediate impression you get is that it looks a little like Safari. When you open it for the first time, you'll notice that the right side of the window is blank, because it's here where you can display additional technical details about the page you're viewing. If you want to view the page full screen, click the square button in the top left.
The preferences in Sunrise are a bit limited but there are a few other additional features which make it an interesting option. For example, Sunrise includes thumbnailed bookmarks, which simply allows you to drop an item into a web page or the tab for easy access. In addition, the URL bar also functions as a web search bar - if you don't preface your word with 'www.' it automatically assumes you're searching for something.
Sunrise is, however, clearly aimed at developers. Most of the buttons in the limited task bar consist of those to reveal the source code, send a big report or take a snapshot of a page. Most general users won't find much use for any of these.
If you're a developer and want a browser that's tailored for your web creation needs, then Sunrise is an excellent option for testing pages in the WebKit engine.
