Pros
The salary and benefits are by far above average. Good balance between private and work life.
Cons
The job is very repetitive and many senior colleagues are not motivated anymore. The management is awful (as featured in many major European newspapers). Being an international organization, they are not subject to national labour laws and they are currently implementing strange reforms at a very fast pace and without carrying out any kind of impartial assessment. The recruitment process in random : many patent examiners were interviewed for one field, and then they were assigned to a completely different field after the initial training. The probation period is very long (one year) and the result of the probation is somehow a lottery, depending on many out-of-control factors.