Very light and so does not make the plane too heavy. There are two knobs to loosen in order to adjust the angle of the guide, easy to forget one until you're used to using it. Works well for the competent DIYer and maybe professionals too. The bracket that is used to hold the guide to the plane could be more rigid, it is easy to bend the bracket if you apply anything more than the weight of your arm, it springs back to the original position when you release the pressure though.