I got mine from Sideshow last weekend, and here's how it looks posed right now with Endgame Cap (in the nearly universal poses for each figure):
Out of the box, it felt underwhelming. It has the same oversized body proportions that I dislike about the diecast Mark VII- too tall, shoulders too wide, chest too big. The Mark 85 design still hasn't won me over (it's comic-inspired, but not the design I grew up with), and I feel like my Mark III and XLII figures have more presence. It's not all negative though- I do like having a fully battle damaged IM figure (even if just the front), and the engineering is pretty amazing with all the different joints/flaps.
In a standing pose, it towers over Cap, so I ended up going with the same kneeling snap pose that everyone else will be doing, just to hide the proportion issues (and he still looks too tall, even kneeling). However, that's also where it started to shine- the unmasked head sculpt is the best I've seen so far (my last one was for the Mechanic), and with the right angle/posing, it looks like an actual movie still (HT's bread and butter). The rock base is pretty cheap, but it almost seems designed for the kneeling pose given the rock layout (and slightly cushioned material). Overall, it feels much more like a Tony Stark figure rather than an IM figure (the nearly clean armored head sculpt doesn't help).
After having it on display for a week, the shoulder/chest proportions still look off. Oddly enough, both EG Cap and IM Mark 85 figures have exaggerated hero proportions- it's just that the EG Cap head is too small while the IM body is too big. I'll give it another week to see if I decide to keep or not (leaning towards no). I like having the IM snap represented on the shelf, but there are too many aesthetic issues that bug me given how much the figure cost.