Good design when it is done well becomes invisible. It is only when it is done poorly that we notice it.
Jared Spool

Jared M. Spool is the founder of User Interface Engineering, the largest usability research organization of its kind in the world. If you’ve ever seen Jared speak about user experience design, you know that he’s probably the most effective and knowledgeable communicator on the subject today. He’s been working in the field of usability and experience design since 1978, before the term “usability” was ever associated with computers.
Further FunThinking
Jared Spool 2018– Beyond the UX tipping point