If you've finished 99%, and your product isn't successful, the last 1% wouldn't matter. Actually, I would even go with the 20-30% threshold. Many great produc

If you've finished 99%, and your product isn't successful, the last 1% wouldn't matter. Actually, I would even go with the 20-30% threshold. Many great products got traction from the start. Think Twitter, Stripe, Facebook, Craiglist, and etc. Even the first version of iPhone was far from done.