Doesn't even launch. The window appears very briefly then closes immediately. If any of the maintainers are here let me know how can I help you with this. I'm on Windows 10 version 1703 (OS Build 15063.13) x64
On Linux it's theoretically possible to force Servo into software-rendering mode, though when I've tried that it has done nothing even after 20 minutes.
However it's not yet available on other platforms: