Stunning, of course.
But just why is it so good? First, we have a perfect and beautifully balanced composition. The eye is led through the frame on a classic 'S' curve, bottom left to top right. Notice how the curve itself, formed by the peak of the dune, enters and exits from the corners of the frame, always good but often hard to do. This 'S' curve on its own would be placed too far across the frame, but it has been expertly balanced by the intersecting dune flank which anchors it to the left border. Then there is the distribution of light - brightest at the extreme right, reducing in receding planes across the image towards the left. The top left of the picture is left to darkness, as it should be, with no attempt to lift the shadows. This increases the drama of the image. Lastly there is the richness of colour and texture on the brightly lit right-hand flank, reminding us of molten bronze or gold.
This is a pretty damn good dune picture, Mr or Ms shadowblade. I bet you didn't need us to tell you that, did you?