Very good.
I find it to be really cool to customize your turrets to that extent with such a simple interface for it. -1 point however, sometimes in a pinch I find that the way you choose your color nodes for the turrets to be a little frustrating in a pinch. Especially mid game. This is because if I place the wrong one, I can't just scrap it, because of the cool down timer for them. Other than that though, very good.