2pcs Water-based Pen Portable Students Ink Pen 0.38mm Smooth Filling Ink Pens Piston Filling Pen Bulk Portable Sign Pens Ink Style Pen Roller Pen for Office Business Supplies

I like these, but feel like they could use improvements. Also, they're pretty thick, kind of like holding a marker, which I like, but might be an issue for others.Pros:• Refillable• Lid securely screws on so it won't come uncapped and leak in a bag or pocket• Clear pen body so you can see how much ink is in the pen• Fine needle tip pen• (so far) writes smoothly with no skipping, dryness, or scratching• Piston fill mechanism can be turned until it clicks when full to sort of lock into place to help prevent accidentally ejecting inkCons:• Piston fill mechanism is built into the pen body instead of being an internal mechanism, so, despite the "lock" element, it's still pretty easy to accidentally turn the piston and shoot ink out, especially if you put the pen cap on the back of the pen when writing (due to the muscle memory of unscrewing the pen cap)• (from personal experience) The piston fill not being internal means that if you put the cap on the back and then aren't very careful when removing it (and/or if part of the piston mechanism is cracked or broken), it's very possible to accidentally rip the piston plunger out entirely and spill all of the ink that was in the pen• I haven't tried this, but I suspect the small (fine) needle tip would most likely jam up if using shimmer inks, so the useable inks are probably limited some by thatTldr; I like these pens, would maybe recommend them for people who like the ink variety of fountain pens, but the writing style of fine/very fine rollerball and ballpoint pens. Just be careful if you put the cap on the back when writing.

I bought these for my acrylic ink fine line drawing. If not using regular ink I found it best to add a little water to thin it out. There were no instructions as to how to fill them so I had to google & even then found it difficult. Not expecting them to last that long but served its purpose for what I needed it for.

LIKE:SMOOTH writing!Easy to fill, just put it into the ink (bottle of fountain pen ink, watercolor, etc) and turn the knob to pull it inNib is fine and writes surprisingly well--very smooth writingComfortable to hold to write withGreat for reducing waste--instead of throwing away pens or cartridge refills, this is very sustainableIf there were more stars, these pens would get them all!

Was not aware that the ink was not included in the package. Now I need to track down the ink that fits these pens. Disappointed this was not fully disclosed up front. I would have paid more to have the ink included.

These pens do what they're supposed to do: they write. The ink flows smoothly and doesn't skip. However, the build quality is really bad. One of the two pens I received broke when I twisted the end to move the filling piston. I was able to put it back together, but it feels very fragile and like it could fall apart again easily.Both pens hold fountain pen ink well, and I haven't experienced any leaks yet. Still, I wouldn't trust carrying them in a pocket or bag.The grip feels nice and I like being able to see the ink in the clear barrel.Considering how inexpensive they are, I'm giving them 3 stars. They work for writing, but the poor construction, especially one coming apart, is concerning. Might end up at work so I can still use them regularly but also wouldn’t be upset if one walked off.If it wasn’t for the poor quality, I like the overall look and feel.

This set is a good value with two refillable rollerball style pens. They do not include any ink or instructions and arrived in a plastic bag. Here are my pros [+] and cons [-] after using the pens for a day:[+] Holds a good amount of ink[+] Flows well ( I tested with a water-based fountain ink and a pigment-based non-prrmanente fountain ink][+] Easy to refill[+] Cap posts on pen when in use[+] Cap screws on when not in use and will not accidentally slip off in your bag[+] Fine, smooth writing tip[+] Clear body allows visual inspection of ink to determine color and level[+] inexpensive / good value[+] Less environmental waste since full pen is reusable without having to throw away the body or a refill cartridge[+] Allows you to choose the exact color and type of ink you want to use[-] Cap Clip is heavy so weight is unbalanced when posted[-] Plastic body is not very comfortable to grip while writing[-] Ink flows when the top of the pen is twisted. When the cap is posted on that end, twisting the cap also twists that plunger, which can cause a blob of ink to come out.[-] Cap removal is is a bit confusing for my muscle-memory as you need to twist to take the pen cap off the writing end, but you must pull and NOT twist it when posted on the other end or it will move the plunger.

It’s a nice pen but the tip is super scratchy.Not for me but if you like that then this is for you.

I was cautiously optimistic about these, and they have been ok (not good like my J Herbin or Schneider refillable rollerballs) because there is done leakage from the tip into the cap.