Perhaps the most important attribute for pilot devices used in industrial automation applications is long-term reliability.

Although pushbuttons, selector switches, and indicating lights may be some of the simplest components found in many automation systems, their proper functionality is a requirement for correct operation of the entire system. Even the least expensive pilot devices will work when installed, but only the best will still continue to function after decades of hard use in demanding applications and environments.

When a product works like it should for its expected lifespan, it's a good product. When it doubles that, you're dealing with a level of quality that is exceedingly rare.

Anyone who takes real pride in what they design and assemble, lives for the moments when a product they were responsible for comes back after performing reliably for far longer than anyone could have expected.