Favorite one in the line up so far. Good mix of aesthetics, articulation, poseability, and balance. It can be cumbersome with the backpack on in bot mode, but it still looks pretty good, and it can be taken off. Also comes with extra head sculpt, but it's hard taking off the one on the figure so I didn't bother because I didn't want to ruin the visors.
Ab crunch, upper half of chest swivel, waist swivel. Right shoulder's impedes range of movement, but it's enough to pull off poses. Also, the articulation on the legs are pretty awesome. I especially like the knees.
Extra head sculpt. Too bad I didn't succeed in taking off the standard one.