Worst soldering product ever. No it's not worth to be a soldering iron it's called "disappointment iron". It probably work on TV because they kept changing the tip. The concept is great but the graphite tip is too piss poor weak I bet you if you drop it on the floor with the tip pointing south it will break in one go. From 6" / 150mm height.
So I was one dumbwit to purchase two because I thought the first one was manufacturing defect, years later.. no dice!
Here's the tip, of course it doesn't look like the original because it's so weak everytime you poke it on the copper it chips away I had to file it again and again.
Fragile graphite is one problem, the second problem is that the glue/epoxy/binding agent that holds the two piece of graphite together in the middle actually melts and expands then ooze out when it heats up. It hardens when it cools and create a barrier between the two graphite and there you have to break out the file again to remove it. You need the two piece of graphite to create a short but the insulation prevents it. Piss poor engineering.
It just makes me boil everytime I see it, I want to shaft this rubbish up the person's backside. I hope you are reading this because you one EVIL motherearthkiller who created an unnecessary landfill.