The official Fall of Cybertron Optimus Prime figure was such a disappointment when compared to the War for Cybertron figure because of its smaller size and less complex transformation. Planet X Jupiter corrects those issues and is an impressive addition to the Planet X line.
The Cybertronian truck pretty much looks like it leapt out of the game. It looks great, but I still prefer his War for Cybertron truck mode. The line work and energon lines look fantastic. He rolls fairly well on plastic tires. His rifle does peg onto the top, but lining up the the two tabs was very fiddly for me. Trying to peg it in always resulted in the arms untabbing from their panels.
Transformation from robot to truck mode was not too hard, but it was kind of fiddly. The hardest part is the legs. Feeding the thrusters from the back of the lower legs to the front is kind of tricky. You just have to patiently work that double hinge to get enough clearance. The panel with the wheels also takes some force to clip into place. I couldn’t get the top thrusters to stay tabbed into the legs/back of the truck. One side or the other would keep popping out. Going back to robot mode was easier, but you still have to patiently work those thrusters through the leg.
I just noticed that every Planet X figure has that swirly pattern on the plastic. Pink energon lines and metallic silver paint applications complement the line work. He has a beautiful head sculpt, with blue light-piping that works really well.
His head is on a balljoint. His shoulders are on swivels and double hinges. They do not butterfly. His shoulder pylons are on their own hinges. He swivels at the biceps, wrists, waist, and thighs. His thumbs are fixed. His fingers are single-pinned and articulate as one unit. He has single-jointed elbows that get to 90 degrees and single-jointed knees that almost get to 90 degrees. His hips are on universal joints. He has ankle tilts and foot rockers. 
His accessories include his rifle, a sword, and a battle axe. The rifle has cleanly applied blue paint. It has a standard port that fits well in his hands. The scope is on a hinge to facilitate that hand-turned-gun look. The sword and battle axe have black handles and red transparent plastic blades. The handles simply slot into the ports on his hands and stay firmly in place.

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Jupiter will be standing on my Planet X shelf, next to his War for Cybertron version from IT’F. When viewed side-by-side it really looks like Optimus Prime upgraded himself. Despite some fiddliness with the truck mode, this is a great figure. I hope that Planet X will bring us a worthy Megatron next.