I just gotta say this is currently my third favorite Iron Man figure. The weight feels nice - diecast on the upper and lower legs, biceps and back of the upper torso armor. Not as heavy as the Mark 42, 43 or Iron Patriot/War Machine armors, but it's still substantial.
I don't get the disappointment over lack of waist articulation - it was never meant for that. With the inclusion of the interior torso details, it's just not possible. Even the lack of side-to-side pivot ankle articulation does not bother me and it's barely even noticeable. It's a beautifully proportioned figure with excellent paint and sculpted details (fine lines) which can still show off some really natural-looking poses. The removable pieces of armor, the inclusion of the twisted abdomen ground-punching piece, as well as the moveable flaps make up for any lack of articulation as long as you are comfortable with the intention of the figure. Once again, it just wasn't designed to do those things, but it's still a really nice figure.
What does bother me is one of the hip pieces was not attached when it arrived and I am currently looking at a replacement if possible.