Pros
The ILO offers a lot of exposure to experts and policymakers in diverse areas. Junior employees in the field offices get the opportunity to take on a lot of responsibility and manage a great deal - I'm not sure if this is the same at the headquarters level. Colleagues are genuinely interested in the subject matter, as is management. People in field offices are approachable.
Cons
The organization can be really bureaucratic, which means things don't get done as fast as you would like - a lot of delays come from HQ. There is a disconnect between field offices and HQ. ILO is slow to modernize and constantly changing computer programs, systems, goals and reporting needs. Very difficult to get real staff positions, even after years of consulting full time and performing all of the functions of staff.