"Rather silly" is my first and lasting reaction to "The Internship".
It tediously recycles overused concepts to craft, if that's the right word, a predictable and oftentimes absurd, action espionage thriller. It's all about a group of super spy teens trying to escape the CIA, that created them. Worse still, the evil Russians are out to exterminate them, or are they?
The action, such as it is, is reasonably well done, if implausible, and the acting is alright but not inspired.
In summary, a very ordinary action spy thriller you have seen many, many times before in one form or another. A basic watch.
