I flew Boeing's Starliner spacecraft in 4 different simulators. Here's what I learned (video, photos)   

 Boeing Starliner astronauts spent hundreds of hours in simulators preparing for Crew Test Flight, which lifts off May 6. I got a brief taste of what they experienced. 

https://cdn.mos.cms.futurecdn.net/cWifFA8XZovvQUjFq33fHe.jpeg

https://www.space.com/boeing-starliner-simulators-nasa-lessons-learned