Pros
I work for Arrow ECS France Cloud branch (ArrowSphere). Great atomsphere, about 100 people so feels more like a start up with a strong company behind it. Friendly people everywhere you look. The technical architecture is state of the art (CI/CD, Cloud optimized, ...). Very good strategy leading to strong growth without putting too much pressure on the employees (strong growth = good collective bonus by the way). Good life/work balance, can work up to 3 days a week from home. Good company values which I have seen applied in my division.
Cons
Some processes with Arrow Electronics mother company can be tedious - not worse than any other huge company. This mainly hurts for hiring more people and investing more into a winning solution. Medical insurance (mutuelle) is expensive.