Every person I talk to has a story about how their smoke alarm went off or woke them up with a battery beeping. So you take it off the wall and you take the battery out and say screw this. They hate the products.

Even if you have constrained resources, don't cut corners. People will feel it.

I've been working with contractors designing and building a house on a nonstop basis since I learned about all these systems of audio, construction, electricity, energy, water systems.

We're thrilled to join Google. With their support, Nest will be even better placed to build simple, thoughtful devices that make life easier at home, and that have a positive impact on the world.

Google has the business resources, global scale and platform reach to accelerate Nest growth across hardware, software and services for the home globally.

I'm always doubtful. Everything I do is always doubtful. When you're trying to differentiate, there's going to be this gut sense, is this right? If you're not having doubt, then you're not pushing it hard enough, or you're not looking at the details close enough. You need to be feeling that doubt every single day.

Every person I talk to has a story about how their smoke alarm went off or woke them up with a battery beeping. So you take it off the wall and you take the battery out and say screw this. They hate the products.