This is just an extraordinary model, and the perfect exemplar of just how damn good Games Workshop's designers have become at sculpting using modern techniques. This miniature literally could not have existed five years ago!
It was also surprisingly easy to paint to a level that I didn't think I'd achieve given the amount of effort I put in. It's not much more than a zenithal basecoat with a rattle can, some pin washes, and a bit of drybrushing.
More pictures below the fold.