There will always be consumers who leave negative reviews on hand made connectors and other components because of their inexperience with soldering and mating. I honestly can say this is an awesome mono 1/4" plug! I used Cardas solder which went smooth and quick. Soldering to the correct contacts is not difficult. If you are unsure of the connectors you need , then the whole piece is the signal connector and the long part with the teeth at the end is the ground.Pretty basic knowledge, but I'llβ¦