These are just amazing, really nice quality pens. Know before buying, these are for art, not for day to day writing which I have weirdly seen some reviews complaining about. These pens are top quality and have lasted me longer than I can remember, I'm here now to resupply. The brush tip is especially amazing, but the rest of the pens are just as good. Most brush tips I come into have bad coverage and fall apart as they touch the paper, leaving a scrappy and faded look. This pen comes out completely coloured and leaves a lovely clear line, with a great colour. The pigment is amazing and works on all media. I have used this on canvas, paper, card, leather and they all have the same beautiful result. The only thing I would say is the xs is quite sensitive so be careful when applying pressure as the nib can bend, but that comes with most 0.1 liners. Anyway, I highly recommend this to anyone who is interested in art or requires some pens, these are phenomenal for a very cheap price.