Thanks to great work by paleoartist Bruce Currie and the technology of 3D printing, the Paleozoo model is amazingly detailed: when they say "museum-quality," they're not kidding.
Paleozoo image: my pedestrian pictures of the model I received are below.
Anatomically, I think Bruce got it right. The armor plates are covered by skin, but the joints and wrinkles allowing for movement are easy to see. Currie used as source material a skull that was then in the Queensland Museum, along with articles and three papers linked to in the very good discussion Currie has prepared on the Paleozoo website. (I used two of these in my recent Prehsitoric Times article: if you're curious, they are here, here, and here,)
The dorsal fin size is logical, the other fins all look good, and the tail is in line with the latest arguments that it was more shark-like than eel-like. There's sculpting inside the open mouth, too. The coloring, if necessarily conjectural, makes sense and is the most detailed pattern I've ever seen, and while the pose is pretty much straight-line, the model projects the presence of a real animal. The skin is textured all over, with a feel a bit like fine sandpaper.
The production using 3D printing has its advantages and a couple of slight disadvantages. The advantage is the detail I've been raving about: every fold, wringle, and bump is rendered to a level I've seen on no other Dunk model at any price. The disadvantages are that there's a finger-sized hole on the bottom and there are small striations running longitudinally on the flanks if you look closely.
The use of 3D printing means a different plastic composition that the vinyl models. It's inflexible, allowing for all that detail to be scuplted in but also meaning you have to be a little more careful in handling it. Despite elaborate packaging, mine came with a couple of millimeters of the upper tail lobe broken off. Bruce immediately offered to replace it in line with Paelozoo's 100% no-damage guarantee, but I think I can fix it with a tiny dab of superglue. The finish applied over the model makes it a little less reflective than on some of the vinyl Dunks, further adding to the realistic appearance. The model even comes with a cool specifications card on the animal.
Recent Dunkleosteus replicas, especially from CollectA and Mojo, have raised the bar considerably for Dunk model-makers. This one is much more expensive than most rivals, about $64 U.S., but it's worth having. Trust me.