The only metric that matters

Useful perspective on metric that matters and how it evolves. And what’s the only metric that matters?

How many people are really using your product.

Pretty simple – but doesn’t this cover a lot of stuff around product – onboarding / UX / utility value etc?
Josh Elman has worked on Twitter , Facebook Connect, Zazzle, LinkedIn, RealPlayer and is currently the partner at Greylock.