Quintus Prime!
He's... he's green.
Alright, so he's got good proportions, decent range of motion, and the both modes individually (I find, anyway.) look very good. Very organic, even sleek. His spaceship mode looks like a missile, or dart; very fast, almost insectile. There's basically nothing to the transformation, so easy to remember. He poses fairly well: but while his dress looks scholarly and wise: it's largely in the way of the legs, but he's also got a decent center of gravity so he's not hard to stand up or pose.
But, realistically: there's not much here. The outstanding part of this one is the biological styling. Unless you're doing what I am and going after all the primes: you might save some money and skip this one. Sure he looks pretty good pondering his orb, but... to each their own. Don't regret getting him, wouldn't miss him if he's gone.