I have not done a 10 day sit as described in TFA, but I've had a passably regular Vipassana-style meditation practice for a few years now, and concentration and impulse control have been two major benefits in my life.
One thing that comes with impulse control, but I find valuable enough to merit mentioning on its own, is that I am now much better at letting go of thoughts. I used to have difficulty with intrusive thoughts--fantasies of violence or humiliation that would play on loop in my mind. Now, they appear, drift once through my mind, and are gone. This also applies to getting songs stuck in my head.
For context, I grew up in the Christian church, identify as atheist, and have only a mild intellectual interest in the spiritual trappings of the tradition from which meditation comes to me.