but it's not the best brush pen I've tried
343847
It WORKS, but it's not the best brush pen I've tried. The pen leaks sometimes and the brush is sensitive!
3608504
The Copic Multiliner Brush pen is not a 'real' brush pen, unlike, say, the Copic Gasenfude or the Pentel brush pens. So it is important to get that out of the way- this is NOT going to be like inking with a brush. It has a felt tip, but, unlike many felt tip pins, the Multiliner SP brush pen has a decent amount of 'give' and the nib does not feel gummy against the paper and the inkflow is very smooth. Because it is not a true brush pen, though, you will not find that it produces the super wide range of dynamic lines that other brush pens or brushes can.

However, unlike its technical pen siblings in the Multiliner SP family, the brush pen can produce varied line widths. I tested it against the other Multiliner SP pens and have found I can get it a bit thinner than the 0.5mm tip, and with enough pressure, all the way to Copic Sketch's Super Brush nib thickness.

This is great for someone like me who wants some dynamic line widths, but needs more control over their tools than what a brush pen can offer. If you have tried to ink with brushes or brush pens and find that you can't keep it steady enough, this might be a nice alternative. I have come to prefer this pen over inking with brushes or other brush pens, especially if my hand shakes or I'm inking when I'm starting to get tired. I've sacrificed some of my lines' bold and varied quality, but, coupled with the rest of the SP set, I get all the line widths I need to make a piece feel more alive. Plus, I don't have anymore issues with controlling the lines, and I can work much quicker.

This brush pen is also one of my favorites because it's refillable, which gives it a leg up and I feel justifies its somewhat high price. The ink quality is similar to that of the other Multiliner SP inks- high quality, nice and dark, and won't bleed with Copics if you give it a couple of minutes to dry. (This may also depend on the paper type you use. I have found that on very thick paper, these pens do not dry very quickly, but on my regular Deleter 135kg manuscript paper, they dry within about a minute or two. It is a good idea to TEST YOUR PENS AND PAPER'S COMPATIBILITY before coloring with markers- it could save your pieces!) The ink flow from the nib is absolutely fantastic- super smooth and consistent. When you find that the ink resevoir is running low, swap it out for a SP Refill (Type B). Changing the ink cartridge is very quick and easy.

The nib. Let's talk about the nib. I mentioned earlier that, with pressure, it can give some pretty good varied lines (from 0.5mm to Copic Sketch Brush nib size), and it has a lot of give for a felt tip pen. But with that comes what I think is the big problem with this pen. I have noticed, and I've seen a lot of others mention this, that this nib is kind of fragile That's...kind of bad compared to the other pens in the SP family. I have had a couple of nibs last for a LOT longer than my brush pen before needing  to be replaced, but I'm going to assume that this has to do with two things:

1. The amount of stress that's put on the nib when varying the widths (inevitable)
2. The paper.

Be VERY careful using this pen on 'toothy' or rough paper, because I feel like that can contribute to the faster degradation of the nib. I think since this nib is more likely to get abused, it's not going to last as long for most people as the other nibs in the series. But, thankfully, these nibs are replaceable, and they're pretty cheap to purchase. Switching them out for new ones is relatively simple and painless.

So, in summation, this is a great felt-tip brush pen. If you're looking for a 'true' brush pen, this isn't it, but it's still a really nice product, if a bit fragile. I recommend this brush pen very highly.
1062364
That's the problem with this pen. The erasing is fairly good. I'm looking for a better one.
3229219
The fine tip wasn't quite as "fine" as I had hoped it would be, but the pens are of a high quality
853981
Not the best paint pens in the world. The tips drag against the paper and cause the paint to splatter. It's also not very opaque even with a slow and steady hand and practice.
3091218
It looks nice, but either the cap doesn't seal very well or the nib is just terrible (I'm not technically saavy enough to know which), but it dries out very quickly.  As in, I can use it in the afternoon, cap it, and then next morning I have to dunk it in water to get it going.
4098710
It seems like it's not the best made product in the world, but it works out the box.  So, we'll see how long the stylus tip stays on (I've used better) and how long the pen lasts.
3608808
This pen looks very neat, but for me it does not write that way. The way it is twisted forces me to write unnaturally; it is just not a good fit for my hand and is not a comfortable pen to write with. Or perhaps it is the nib itself, but I find that it skips too much and does not write smoothly. I am using one of the red iroshizuku inks so there is no reason why it shouldnt write smoothly. Maybe if the point of the nib were angled a little more downward it would write better. I have many other less than $20 fountain pens that write beautifully, but this just is not one of them. I would send it back, but since it came from Germany and the shipping was free, it isn't worth the trouble to do that. I just won't be buying any more of these pens. Hopefully you'll have better luck than I did!
822840
Some of the color's (in my pack) seem to be a bit difficult to get color out of like the pen is dried out, (mostly the light color non glitter ones). But I've found if you tap it with a little force on a scrap paper so as not to mess up the paper your working on you can get the color to work.
3214710
I've noticed that the lifetime of my retractable sharpies are far less than my capped ones. The retractable feature doesn't always work perfectly, and it lets air get to the tip of the markers - thus drying them out. A cool idea, but not perfectly executed.
1705471
I love the other Pilot Frixion pens with just one color per pen, but this one doesn't write smoothly -- possibly because it's a finer point.
2952393
pen was OK, a good pen for the price, writes a little scratchy.
1975471
It's an artsy pen. Not a writing one. It has a s***ty tiny felt tip pen and if you write too fast like I do it sometimes drys quickly. I'd buy a different brand if I could
4916988
These pens work fine, but the point is much thicker than I thought it would be.  They're more like a fine point marker. You can see the difference between the fountain pen and a normal pen in my photo. I was also hoping that it would have a flat edge that would work for calligraphy, but it's round, so it doesn't give that nice line variance that calligraphy pens do. I'm trying to learn better cursive (obviously I still need a lot of work...), so I don't know a lot about the different types of pens. It's also not very smooth writing. This pen might work well for some people, I just thought it would be different.
2189031
Writes and draws very well, you just have to get used to it as it's different from any stylus I've ever used.....
806686
A great pen, it just takes some getting used to to get the right stroke and thick/thinness ratio.
3811062
I thought that the fine nib would be finer.  It's otherwise a good pen for the money.  Not as good a flow as my Nemosine.