Pros
Due to the companies small size as a entry level manager (they have three levels CMT - lowest level, CLG, mid/senior managers and CET - Directors/CEO) you are exposed to lots of areas of work and gain lots of first hand experience
Cons
Beyond hierarchical, CET reign with a strong iron fist, this culture then rolls down and CLG think it's appropriate to behave in this manner; I have been yelled at on multiple occasions by CLG members and dismissed many times in meetings because I was deemed to junior (because I was not a CLG member); generally the culture there is pretty poor, lots of employees who have worked in the company for 20/30+ years who are waiting for retirement and/or to be made redundant (IAG/BA redundancy package are always quite large). Working at IAG Cargo was one of the lowest points in my career, the culture at the company is really unfriendly and emotionally draining. In summary, I say get in and get some great first hand experience and then get out within two years (you will have a lot of low points in the company - but keep in mind IAG is a great company to have on your CV and use this as motivation through your many low points to make it out the other side)