Vantaggi
Your coworkers will be pleasant, capable and professional. Your manager will, in most cases, also be pleasant, capable and professional. Your requirements and timelines will be reasonable, or as close to that as can be expected at a tech company. You will always work on real projects that ship to customers. You will have reasonable work/life balance. Many of your coworkers will be quite knowledgeable so you can learn a lot from them.
Svantaggi
You will not care about the things you work on. Outside of a few very specialized hardware design roles, you will not innovate. You will constantly be reminded through white-bread internal corporate PR emails about your responsibility to add shareholder value. You will kick and scream dealing with an IT organization straight out of 1997 that will excel only at wasting your time and infuriating you. You will not have an opportunity to advance your career because your manager, their manager, their manager and the 7 managers above them have all been with the company for 20+ years and aren't going anywhere. If you do happen to work with someone who doesn't do good work or isn't a good fit for the role, tough luck because no one is ever let go for performance reasons. You will make a below-average wage for your field and level of experience. You will likely work in a facility that hasn't been updated in decades.