Pros
Good mission for the company, C-suite truly believed in helping customers. The other departments (besides Engineering) seemed to be doing great, I enjoyed interacting with people outside engineering and they seemed to be doing well. Good compensation and benefits. Peers were kind people and I enjoyed working with them.
Cons
It's always a tough transition when an engineering department grows rapidly. Unfortunately, although at a surface level it might not have been noticeable, in this case things didn't go well. (Many of the most talented engineers left the company out of dissapointment.) Timelines became difficult, I wasn't given sufficient time to coach/assist teammates, and engineer's voices weren't heard. Some managers were negative influences; one had a combative style along with a documented tendency to unfairly lash out at those who disagreed. The environment that used to be supporting and positive eroded away.