Avantages
Get to SEE things that you don't normally see, such as defense projects, etc.
They have some nice people, and they are all very friendly.
Inconvénients
Do not get to do anything as an intern regarding these cool projects probably because of security clearance.
Slow pace of work with lots of waiting around.
Worked on programming without any internet access.
Security red zone makes you unable to carry around smartphones, flash drives, computers, tablets, so there was absolutely no access to internet.