Love the colours on the cape and the blade, freehand is good also.
Points to improve for me, are the NMM both the silver/steel and gold, and also the black armour. Those three look a bit too matt where they should be a lot more shiny IMHO.
Also being a total noob on the 40k world I do not understand that "third" eye on the forehead of the man, but it should have its history behind so I mute myself ;)