Pros
Good employee compensation and benefits. Collaborative and enjoyable work environment with passionate team members. Great and kind leadership and culture. Been here for many years and in different roles, most of my line managers have been great bosses and I'd be happy to work in their teams any day.
Cons
Workload can get intense, depending on your role & stage of project cycle. Limited career progression opportunities internally, especially from assistant managers to managers... you'll have a higher chance if you have a strong sponsor (be it your mentor or line manager) to back you. I've also seen external hires getting hired for these roles instead of promoting from within, even though there is also a pool of qualified internal candidates who are waiting to get promoted. Granted, the learning curve may be less steep if you hire someone who is already at a managerial level from external, but I wish more commitment could be taken to groom internal talent and give more progression opportunities.