What is the job of a controller (controlling) like?

I'm about to finish my business studies with a focus on controlling and cost accounting. I always get good grades in my exams and am doing well. However, I'm wondering if this profession is well-suited for women who want to have children. How realistic is what you learn in your studies compared to what you do in your job? What's the work-life balance like? Can you do this profession for your entire life? I would appreciate answers from long-time controllers who could share their professional experiences.