Eating Your Own Dog Food (Dogfooding)

"Eating your own dog food" is an expression meaning that the creator(s) of a product / service also use that product / service as a way to test and gather feedback.  Whilst this can provide good, real-world insights as to the experience of using the product / service in question, others argue that this should not be the sole means of testing, as creators are inherently biased towards viewing their creations in a positive light, meaning that critical issues and poor user experiences (UX) could go unnoticed and / or unresolved.