Is this really a good idea?

ARM: Asteroid Redirect Mission

Just happened to stumble upon this one following one link to another, but NASA has a plan to capture an asteroid and put in a distant retrograde lunar orbit, sometime in 2020.

Now I used to be the type of person who would find this cool and exciting, but now I have to step back and ask myself...

Is this really a good idea for the agency that slammed a 125 million dollar orbiter into Mars because half the team was using pound-seconds and the other half was using Newton-seconds?