Pros
Pay is good.
Benefits are great if they keep you around long enough to earn them (1 year or more).
High emphasis on safety. Company policy helps avoid even minor injuries.
Most of the work is very easy and repetitive.
Some work is a lot of fun, while other work is dry, depending on your department, preferences, and where you are placed for the day.
Cons
No benefits for the first year, and no guarantee of continued employment after the first year. They greatly take advantage of their temps (which is how everyone is required to start their first year). Hard working, dedicated temps will be over judged by uneducated, detached supervisors and let go for minor infractions, while employees of 5+ years will be blindly trusted and get away with many, more significant infractions and minimal effort. I saw this experience happen with a handful of temps and then myself, and others after me.
Working harder and having a very positive & cooperative attitude every day did not earn me any job security or advancement opportunity in the company.
Supervisors from another department (one which I was promised to be starting in prior to hiring, yet I was sent elsewhere during training) were bogged down by corporate gridlock and unable to transfer me for a long time while I was stuck working in a department less suited for my skills and preferences, under a supervisor who had far less respect for me.
Lots of people who do poor work have been promoted and retained based on seniority instead of their skills, work ethic.
Safety rules set by people who have never done the actual job sometimes become an extreme hindrance, due to over policing / micromanaging granular aspects of production in the name of safety when not necessary.
Due to how easy the work is (and an unnecessarily high tolerance for immature employee behavior), there is a ton of drama and hypocrisy, often about the smallest things.
Most of the supervisors in manufacturing have little to no manufacturing experience, especially very few have experience doing physical labor for Takeda. The ones who have experience with the labor and got promoted from within are 10x more knowledgeable and efficient at their jobs. This makes most teams completely disorganized and leads to unfair treatment of employees, extra drama, and inefficient man-hour management and hindered production.