I have been quite satisfied with the build quality of this head, as it effortlessly cleared my lawn. After years of disappointment with other heads (as I had 2 with two outlets, which would break every time I tried to use them), I found this one and cautiously purchased it. When it arrived, the good quality aluminum construction without any plastic parts was evident. Of course, installation on the machine is easy and quick. Although I wasn't impressed with the way the cutting thread is held (I have a 3mm thread) with a fairly tight lower screw (so that the head does not protrude at all, otherwise if the screw is lost, RIP head), it easily and securely attached to my lawn and effortlessly cleared the entire garden. As for the downsides, I will only mention that at one point, the head accidentally touched the ground with the screw slightly tightened, causing it to fly off and me having to search for it in the bushes.