In my experience a quilt does not need to be perfect to be cherished. Usually, the only one who is aware of its faults is the one who sewed/quilted it.
That said, nothing is ever truly just "good enough" if you have put blood, sweat, and tears into it. It may not be perfection but it's still a job well done.
I do understand what the OP meant by good enough though. I just don't want people to underestimate what they have accomplished by finishing a project.