To be fair, I was surprised NASA concurred with the report. The last experiment I heard about, the thrust measurement was in the wrong axis (vertical rather than horizontal, so gravity was the most likely source of the measurement). I want to say that was a few years ago, though.

The thrust created is so low, it is useful for nothing except long range space travel. However, it is like the Ion Thruster on steroids (not in thrust provided, but in fuel consumed, or not consumed).

If either the EM or the Hall-Effect work as advertised, long range (outside the solar system) in a somewhat 'reasonable' time could be possible (for very lenient definitions of reasonable). Having to wait just shy of 35 years for Voyager 1 to even leave the Solar System kind of puts a damper on the enthusiasm of interstellar travel.