Shipping and packaging was ok. The concept is good but lacking. Material, weight, workmanship and finish are pretty good (CNC, anodized aluminum). The conductor is well suited for insulated fittings such as XT60. However, there is one improvement I would like to see. Change the design of the jig so that you can insert sacrificial insulated plugs (M&F) from the bottom of the jig so you can just insert the plug from the top for soldering. Allows some heat dissipation through the victim and therefore reduces the likelihood of the insulator deforming during soldering. Specifically for the larger XT90s. As for the black mounting area with different hole diameters for fittings such as banana/round connectors. It is also made of metal, despite the statement "Thermal insulation layer: Black thermal insulation layer surrounded by holes, which can effectively prevent heat spread." This is also a question. It's metal, and metal loves to suck heat. So if you put a fitting in a tight fitting hole and then try to solder, your chances of cold soldering are huge. You'll need to find a slightly larger diameter hole (so that only a couple of attachment points make contact with the jig, not tight), but this ultimately defeats the jig's purpose of holding the fitting tight. Helping hands are better. However, this black mounting area is modular and can be removed by loosening two screws. I'm tempted to remove them and replace them with a nice piece of wood with custom holes. However, the manufacturer might consider making this insert out of silicone. Then you could get a nice tight hole on a nice clean solderable surface. Not sure why the hole diameter dimensions are printed upside down on one side of the jig, but whatever. They're useless unless you care about the size of something. Yes, I have to change almost everything I can. This thing actually creates a sturdier base than my Mini Helping Hands Base. In general everything is fine, but it could be great.