Cons include:
- Steep learning curve
- Schedule is in constant change
As a point of note, the schedule's exceptional flexibility comes from the fact that it constantly changes week to week as per security protocol.
Also, the learning curve is quite steep, despite the fact that they have online training courses in place and progressively wean you into positions of increasing responsibility. There's just a lot to learn (speaking as someone with no prior related experience) and it will naturally take a while to get the hang of it.