I consider this a good episode as a crew member uses logic to figure out a situation. "If everyone else is disappearing, it must be me that is different." Most would not be insightful enough to see that in time. The quick "conjuring up" of the Traveler is the only real let down here.
Quick fact about me: I have visited 11 Star Trek conventions over the years in the midwest and met many cast members big and small from across Star Trek.