@Anataran, 

I use the Carrara Displacement function instead of the Anything Grooves function now. 

Regarding Bevel, I've noticed no increase in render time when using it. For animation, especially if you are doing a tight shot, it is better to model the bevel. Since the plugin fakes the effect, in can have some artifacts on pointed corners such as the cube - but not always - it depends on the render settings and camera distance-to-object.