I'm not one of those macho guys who thinks he can cut straight lines freehand with a circular saw and I am not ashamed to use a guide if it assures straight lines and true joints.
The problem is that most cross cut guides are fiddly and you waste time sorting out the offset... I may not be a macho guy but I do hate fiddly!
This Bench Dog saw guide dispenses with the fiddly part and the only downside is I have to buy one for each of my circular saws (a Dewalt and a B&D) as what makes them less than fiddly is the fact that they become custom to the saw you you use it with. As they are cheap, it's not a problem if I need to buy two!
