Very bad marker. It doesn't differ in anything from a regular permanent marker, in fact its ink was much weaker and half the time it didn't even write.
In the first week, every time you opened it, a second inner cap would come off and you had to take it out by hand.
Also, it's negative that the cap doesn't click from the back of the marker, so you have to search for a place to put it so you don't lose it.

Within less than a month of minimal use, it completely died.
You only pay for the name and get nothing in return.
Terrible