The Moon man/Majohn B32 is not an original design, but a replica of a 1970's German pen that had a 925‰ Silver body and cap (Montblanc 1266). The B32 is a steel body and cap, plastic (likely acrylic) section, piston pen, that set me back 33,21€ (including everything). It is what I consider a middle size (ø11,5mm - L137mm), middle weight pen (26,6g - 17,6g full of ink, with and without the cap respectively). Its cap is both friction fit and clipped, a bit of an odd system that I don't fully understand. The ink tank is rather small for my taste: I have not done a proper measurement of its capacity, but I can say it's smaller than a Waterman cartridge by quite a bit, I would estimate it to be around 1,0±0,2mL based purely on feel. The feed at least, is designed properly for a piston filler: no nostalgic fins, but a smooth surface on the back of the nib, that allows as clean a feel as a piston pen can offer, and incidentally, also low ink waste, which can't really be attributed to Majohn.
The section is easy to take apart, and allows for a proper cleaning, so there is no need to stick to safe inks. And on the topic of the section, mine got pretty awfully scratched right away (it was pristine out of the box, so I did all the damage myself, but not from egregious treatment on my part), it is a part that worries me to a point that I contacted the seller to know if they can source spare parts, and as of right now, no, and due to the steel spring inside the cap, it will get worse and worse. The piston filler is rather typical: it works but it makes the task of getting a 100% fill with it impossible. I just refill mine by inserting a needle tipped squeeze bottle into it because it avoids a lot of what I hate about piston pens (the need for a deep enough ink container, and for cleaning the dipped parts) and it allows for a 100% fill in one go.
The nib is very smooth, rather broad for size (equivalent to a steel Waterman F), rather wet, I would say 6/10, but I have not tried inks that shift color with wetness so this is only an estimate. The grind on mine offers no line variation, but I don't know if mine is the norm or an edge case as it has very little tipping material, and pictures that I have seen so far seem to show that all nibs have that little. It is rather good at erasing paper texture, but it is also good at conveying paper smoothness. It takes a surprisingly long time to dry out uncapped. The nib has a slight springiness to it, albeit a useless one. The pen feels average in size and weight, thinner than it looks even, it is well balanced, but it has the slightest bit of top weight, barely noticeable. It can be posted, but can't realistically be used like that due to the balance.
I have put three full converters through it, and am now on the forth fill (1x 10% v/v concentration Ostrich 555, 1x Waterman Encre noire (old formulation Waterman black), 2x J. Herbin Perle noire), so I have used it a bit now, and I am surprised by how normal it feels. I can't quite put it into words what would make a pen normal, nor why this one wouldn't be. Though what I can say is that Chinese pens feel Chinese, they lack this sort of natural feeling when writing that most of my European pens have and that some of my Japanese pens have. I am talking about that feeling that everything comes together: weight, balance, shape, size, tightness of the parts, overall rigidity, smoothness and feedback in all directions, but also something unquantifyable that makes me trust the pen; all of that to form a whole greater than the sum of the parts. This one, this B32, it is the first Chinese pen I have used that has that feeling, despite numerous of the Chinese pens I own being very good pens. It is a pen that gets out of the way and lets your write. Again, that is what pens are supposed to do, and usual they do it just fine. I suppose that what I'm saying is that it feels rather European. Make of this what you will.
Overall, this is a very pleasant pen to use, it has interesting aesthetics, even if Majohn can't exactly be praised for that either; it offers more colors than the original, yet only offers one nib size for the assembled pen (both F and EF size are available as spare part, in silver or gold finish). It is on the expensive side, even if I got mine for 33€, current typical price seem to be 44-50€ now. I am a little ambivalent about whether or not I would recommend it, I tend to stay away from piston pens as they are less practical than cartridge pens, though this one is designed properly, and this one is pretty expensive for what it is. I supposed if you love the looks like I do, it's a good pen, but one that has an uncertain lifespan due to the steel on plastic interaction on the section.
Writing samples compared to Waterman steel F nibs of very similar size:
