Building Optimus takes about three to four relaxed hours through eleven numbered bags, and the experience is a steady dopamine drip: within the very first bag you already recognise Prime’s signature windshield chest, and each sub-assembly clicks satisfyingly into a transformation hinge or articulation joint. Despite the mech theme, the core is mostly System bricks with only light Technic, and clever offset plates lock the legs for truck mode while click joints give the robot 19 points of articulation. Accessories (ion blaster, Energon axe, Autobot Matrix, jetpack, Energon cube and display plaque) are integrated neatly—many stow away in cavities when he’s a truck. Transformation is intuitive enough to master in minutes, though a few parts (notably the head) can pop off until you learn the sequence. Display presence is excellent from the front; from the rear the hollow truck bed is visible but forgivable given the clean conversion. Overall, it’s a nostalgic crowd-pleaser that balances engineering wizardry with an approachable, almost therapeutic build flow.