Don’t try to be negative but I found that the output of the service has terrible performance.

Most of the UI elements are images rather than CSS styles. The total transferred size for the SurfaceSample goes up to 16mb. Why you load all the @2x images regardless of the screen density of the client?

There are so many bad practices on the implementation that I don’t know where to start.

I love tools that improve the workflow of designers and help them deliver incredible products but not at the expense of the user experience.

It’s 2017 there are tons of good practices that would improve this dramatically without having to compromise your product mission.

Hope you the best for future iterations.