All the [start-up] advice is like this: “You know, it’s really important to have great design. Design always wins. Except Craigslist didn’t have very good design and neither did eBay. So sometimes it’s fine to have no design. But make sure its very scalable, ‘cause you don’t want to be the next Friendster. Except that Facebook wasn’t very scalable and it was fine.

So make sure you have good design and design doesn’t matter, and that it’s scalable, but not too scalable. Also make sure you raise plenty of money, but not too much money. Make sure you have the right kind of people, but not those other kind of people, but actually, sometimes those other kinds of people are fine.
— Eric Ries, The Lean Startup