He is a major acquisition IMO. My concern is he runs too violently and increases the chance of being injured. But you can see the burst and the speed. And he seems to be comfortable catching the ball as well. I feel like he is getting ready to break out... and when he does, it's going to make things easier for Stafford. I think he lacks top end speed but he is fast enough and strong enough to do some real damage to a defense.
I like Henderson more as a complimentary back to Michel.