It is heavy duty and his heavier than the average cirlular saw.  I just used it cutting pressure  treated 6x6 timers and cut through them like butter.  The guide is different than I am used to.  Your drawn line does not align with with the edge of the slot  thus the blade.  There is a mark on the guide next to the slot that you center over your line for the blade to cut on the line. May be able to adjust thiss but thats the way it came.  Just have to get acustom to it.