It's definitely a Fireworks replacement: slices export, CSS export, etc. It functions like Illustrator in the way that it uses a board (group of assets) rather

It's definitely a Fireworks replacement: slices export, CSS export, etc. It functions like Illustrator in the way that it uses a board (group of assets) rather than a limited canvas (a single asset), but it is not a software for doing illustrations or whatever you call what Illustrator does (not native speaker here, obv). Edit: it does @2x automated exports too, for instance. Quite handy for iOS coding or responsive design. I've never had to open PSDs with Sketch, so I can't tell. If you have any question, feel free to tweet their account on twitter: I hear they are reactive and very friendly. And definitely close to developers and designers: a lot of the features added this year have come from user suggestions. Can't tell the same story with Adobe...