This is a fantastic concept, but I will never use it because I don't use Chrome and I don't like the idea of my inbox being different on each device I use.

I'll just wait for Google to either ripoff the idea or (hopefully) acquihire the company and integrate it into Gmail itself.

Really the idea that the message preview is the FIRST two lines is comically absurd, especially for a company like Google. It's actually amazing to me nobody has done this yet.