I want to like Figma but they've chosen a rather limiting way for a professional design tool, cloud-first and based on web technologies.
Surely, Figma beats Sketch for modern interface design by using retained mode rendering (although sacrificed some quality [1]) and being superior at science and engineering.
But it's such an inefficient use of resources that it will die quickly on complex projects or illustrations. Raster graphics and any processing on CPU is also a huge pain [2].
Yet it's in their power to make a proper offline app [3]. I hope they'll eventually choose this route. I also hope they won't be as greedy as Adobe.
[1] http://i.imgur.com/xWLoTWg.png
[2] https://twitter.com/evanwallace/status/673978171180474370
[3] https://twitter.com/evanwallace/status/673959396104273921