Ink does not flow consistently
932107
Pens do not consistently draw so end up having to redo everything 3 or 4 times. Could have been a bad pack.
3139386
OK - wish the flow was better on some of the pens. I like more vibrant, thicker ink. Might be OK for someone who wants thinner ink flow.
2085791
Worked great for about a week but started to have extremely inconsistent ink flow in both of the refills from the package.  It would only write from one side of the pen, only when held at a certain angle or not at all.  I was also disappointed by how scratchy it wrote even when it worked.  The date on the refill was Nov 14 so it can't be due to the age of the refill and I double checked that it was in fact a medium point.

I'm going to try another set...
842368
I bought this because I thought a high-end, to me $50 is high-end, Parker pen would work fine. It has the same problems that my cheaper Parker pens have. The ink flow is so bad. I can't write with a pen that skips during writing, it looks sloppy on my paper. I have tried several other ink cartridges, and it seems to be the way Parker makes fountain pens. I'd still buy Parker ballpoint, and rollerball pens, but their fountain pens are pretty disappointing. I'll check in a few years, maybe Parker will have fixed all their bugs?
1286353
Was very difficult to get the flow of ink going. Like I had to squeeze the ink cartridge....a lot.... then finally it came.  Writing is very frustrating due to constantly having to remove the ink, clean the nib (in a glass of warm water, no additives), dry, reassemble only to go through the same frustrating sequence again.  I have tried 4 different inks from four different manufacturers with no luck.  I once managed to write about 40-50 words on a sheet of paper only by moving constantly.  When I stopped for a minute or so, the ink stopped.  I wish I could return but  I think I'm past the return date.
4732534
Its a nice pen, but the ink never properly flowed. It didn't offer smooth writing and leaked ink from the top of the nib.
692836
the tips on the fineliners started flattening even though I wasn't pressing down that hard. Also the ink doesn't come out consistently.
712766
The ink comes out too much when coloring so its very wet and can be quite uneven when coloring due to pooling.
56941
Great colors, but the writing isn't as smooth as expected and sometimes the ink runs out halfway through a word.
2036071
Keeps stopping like it is out of ink.  Writes a couple words then acts like it is running out of ink.  The first refill was fine - the other two were "not so much"  maybe too old??
2074293
When the ink flows, this pen writes very smoothly with even lines.  The gel ink dries fast enough that I rarely run into any smearing unless I'm writing on an unusual surface...so caution if you write on non-paper surfaces or glossier papers.

Unfortunately, about 1/2 of these pens (I use them both at work and at home) run into ink stoppages.  Sometimes you can get the ink flowing again, but many times you just have to throw them away.  This is very frustrating as the ink stoppages have occurred in meetings (several now) where I can't get to a new pen, and I really shouldn't have to carry around 2 pens just in case.
736928
I like it when it works, but every now and then the ink just does not come out. So every few lines I write, there will be some words that are barely visible. This is annoying.
1264316
I love the colors and the smooth flow of ink and the thicker lines.  However, these pens are mostly horrible as they leave blobs of ink as I write.  Some are worse than others, but all of them do it to some extent.
3335370
They are good for the price and quantity, but the ink seems to have trouble flowing down properly. Even if I take out a new pen, it'll cut in and out of writing sometimes, especially if I hold the pen at a certain angle
1017901
Took a VERY long time to arrive. The pen itself is BEAUTIFUL. It feels amazing in the hand and I love the wood/bamboo grain. I just wish I could get it to write consistently. From the first time it was filled with ink it was spotty. Now I can't get ink to flow at all even with changing the alignment of the silver and black piece and putting new cartridges in multiple times.
537130
I wanted to love these pens.  They don't bleed through my Erin Condren Planner pages, though there is ghosting.  I just didn't have steady enough handwriting to keep the ink application steady.  They also dried out more quickly than I expected.  The purple and the light blue colors are very pretty.
1591897
Hmm...just got these pens in today, and the ink shows up great, but they're pretty streaky and stop working randomly...maybe this problem will be resolved if I use them more, and maybe it's just the type of paper I'm drawing on (similar to folder paper), but I'm not 100% satisfied with the quality. I suppose that's what you get for the great price.