Not the easiest suckers to fit together as they are a bit like one of those wooden 3D models where an unlikely group of components lock together to form a toy aeroplane. There is a lot of 'present two pieces at ninety degrees and then twist', which is a bit messy when they have glued edges.
Anyhow the end results are good. One point, these chappies are BIG even by GW standards. They dwarf old style space marines.