Dogfooding—the disgusting and less than accurate way of suggesting a team use its own product before releasing it to others—is a common way for startups to test their product. If you don’t like your own product, who else is going to? It makes a ton of sense, but it’s not enough.
Very good! I’ve always been uncomfortable with that phrase when used as some kind of indication of adequate usability. Really, it just boils down to a form of group-think.
Dogfooding is enough if you want to be your only customer.