Hey Matias,

Thanks so much for doing this! I'm a Google Expert for Design/UX, and had a question on a topic I'm researching currently:

Material Design is probably the largest design project you've taken on in your professional career based on the sheer volume of users it is intended for (which is in billions). And it gets even more complicated considering it's a design language that other services would need to adopt, and its cross platform.

What kind of user studies did you do? How widescale was it, and how diverse were your focus groups? I'm particularly interested in how much your focus was on users from developing countries, where the Android user base in a pure numbers form is insane and only going to get bigger.