I finished building it. And it amazes me how the designers managed to put Mech designs to the next level of this detailed! This set is outstanding!
Of course there is no knee articulation but that's due to the Mech being top heavy. And that is because the torso and the cockpit has absolutely very creative structure. The build is very sturdy and stabile. The front and interior area of the Mech has the most creative building techniques I've ever seen.
The Mech is really posable on the arms especially on the forearm which us connected via ball-joints to the upper arm. The Shoulder build has two point of articulation due to some useful Technic parts. This allow the shoulders to have more posability so they don't bump into the Wings.
Speaking of the Wings. They can be moved all different position due to the ball-joint connection. The Jet with the Wings are attached to two long Technic rod via two black pins, which are fixed tight in the jet.
The set has 10 stickers, 3 Forbidden Spinjitzu Scroll made of the same plastic material as the recent Dragon wings and many glorious printed parts such as the turbine disks on the wings, the white "scaled" Shoulder pieces and the two 1×2 cheese slope control panel pieces in each side of the interior cockpit.
I wrote a review where I summed my extensive thoughts about the Mech and the set in overall.
If you have any question, feel free to ask it.
I'm willing to answer any about the set.