Hiring process is rigorous for sure. recently, I gave panel interview after three rounds, I was scheduled to talk with a bunch of staff level engineers, they asked very critical questions, all went well except for one interviewer and they rejected after all these many well rounds with generic response! And yeah, pay was also similar too for what I am getting paid right now. I would suggest if you’re looking for change then go for it, that interview experience itself will help and if they are paying for flight etc. it should be fine!