I don't really like his action.
It looks like he's floating the ball down, albeit at some pace, and not hitting the deck.
He twists his lower back as he releases the ball, looks prone to injury there.
Looks like a mixed action.
He runs in well, but i feel he's not using putting all that momentum into the ball and is instead generating force with his arm and back. He isn't bracing his front foot well. He lands his left foot on the side, and not straight, kinda like Morne Morkel, but the bowls and follows through in a side on style.
Compare Morne here with Bevan:
Lillee, Steyn, Bond all used to move their left foot in front of them, land in around the centre of the pitch, bowl over it, and follow through. Morne lands his left foot left to the left of the pitch, and follows through over it. Bevan lands his foot on the left, but follows through straight, if you get what I'm saying.
Meh, but what do I know.