The copic markers I purchased all worked perfectly, they were very quick to respond to an initial shipment mistake.
Sterke punten
Very quick in communicating.
Verbeterpunten of tips
The first time I received the wrong product and I had to make a second order and return the first one. So this was not optimal, considering the price of the article I purchased. But the refund and the new shipment were done so quickly that I didn't soffer any negative consequences.