I am a member of a reserve INT coy and I would have to say that it probably depends on what unit you are part of, and entirely depends on your mindset and expectations going in. I can only speak for my unit.....but if you are looking for the stereotypical military experience, it is not that. It is definitely more of an academic atmosphere. Sure, some training nights we spend some time sitting around doing nothing, but I think that is common with all trades. My unit is also one of the most active (of almost ANY trade) when it comes to deployment.
That's all I'm going to say. Or else they WILL take away my secret decoder ring.