Pluspunten
You get to do things people talk about. I mean it - I remember the first time when I heard random people in a tour bus in a different country talking about something my team did at Amazon in the US. There are no textbooks that can teach you do things at Amazon's scale, you get to invent new solutions that never existed before. Sr. Leadership is typically OK with us choosing how we get things done. We get to deal with ambiguity a lot with little supervision.
Minpunten
I am concerned that past Sr. Manager level in the company your growth opportunities are limited. While it is true that as a Sr. Manager you can do a lot of interesting things, based on my observations, the average time it takes to organically grow from Sr. Manager to Director are ranging from 5 to 10 years. All this time you will be just Sr. Manager.