I had my pen only a few weeks this and ...
927515
I had my pen only a few weeks  this and the writing and circles on the pen have vanished :( so much for using it for my physicals, atleast the light still work and can use it for neuro exams..
4758388
Barely had it for a few weeks and still having battery issues
648745
aesthetically the pen is nice but there are some parts of the pen I would personally.  I will try it when a I purchase a new cartridge because when I received this in the mail the ink spilled out all over the pen.  I think maybe it was the pressure from air mail..
pen is ok weight wise. in fact its very light weight.
1806232
Came quickly but I have only used it for a few things and the ink is already starting to run out.
971949
Within about a week the pen quit writing. Prior to that the pen would fade in and out. I ordered Parker Gel refills for it and now it writes well with no problems. I didn't mind the thought of a cap vs a twist top because the cap would keep debris out when the pen goes in a pocket but, once worn in, the cap tends to come off with very little force which makes it hard to use the pocket clip. Other than that, the pen is balanced well and feels good in my hands when writing.
1382931
At first, I loved these pens. They have a lovely ultra-thin point. They flow so smoothly across paper. The ink is nice and vibrant.

Unfortunately, after just a few weeks of use, the pens started leaking/bleeding often. Sometimes the leaks are minor, but sometimes gobs of ink drip from the pen. Then the ink gets on my hands and on other pens and highlighters in my pen holder. There are huge ink stains on some of my papers because of the leaks. It's frustrating. I don't know how to make it stop.

I've learned to check the pen tip before lifting it out of my pen cup. I'll continue using it until the ink runs out, but because of the leaks, I won't purchase this pen anymore and I won't purchase any refills.
3119630
Pen worked really good while I had it.  I received it in the mail this morning. And tonight my car gets broken into and my art bag gets stolen which had this pen.
4125990
This pen is a piece of garbage. It worked for about 45 days then crapped out. I thought maybe it was my phone at first so I did some research online. I tried everything I could find to try and make the pen work to no avail. Thank goodness I didn't have to spend very much to replace the one I lost. I will not, however, purchase again from this seller.
3569575
Only extra-fine point paint marker i've found, works great for a little while, but dries up quickly during storage between uses.  If you used this every few days it'll do wonders.  Put it in your pencil cup and try it after a few months and it's dead as a door nail.  UPDATE, November 2017: Out of the order of a package of 6, #5 just bit the dust like all the others, this time after only 2 weeks open, capped consistently after every series of strokes, still full of paint-ink, as proven by the massive leakage from the shell around the tip while trying to work it, but would any ink would flow thru the tip? No, not at all.  Would be a great pen if it worked.  So disappointed, so in need of such a device.
450127
I haven't had these for more than 2 weeks, and Im down to 3 functioning pens. The stylus tip is loose and it pulls out of the pen not they don't stay in the stylus. Shell out the extra cash for a good stylus
3149986
These pens started to fade within the first few weeks of use. I opened them within a day or two of receiving them and did not use them an excessive amount. Additionally, the colors transferred onto the pen you're using even when just barely touching another color on the page.
546725
I love the pen, but the stylus tip didn't work well for long.  I may contact the vendor for a replacement.
3848013
The pen is great , but wouldn't last long , I purchased mine a year ago and didn't use it that much. Now it's sitting in my desk , the ink isn't flowing as it was before, I cleaned the nib several times , with water and alcohol still not working.  I just wish I bought something different that would last longer !
4035047
I got it in just today and now I see it as unavailable.  Well, to test this pen out, I used my HP Touchpad to take notes on this online course.  Works just like a real pen.

The build of it feels cheaper than the $9.85 I paid for it.  I'm hoping it lasts because I'll be using it a lot for note taking.
2745657
This pen writes well but ran out of ink in like 3 weeks.
359259
I've used this pen for about a month and fell in love with the feel and writing of this pen, though granted, I haven't used any other pen, I still feel the tips are still far too fat, but this is the smallest tip available at the moment.

And within a month of using this pen, the tip cracked open. I searched everywhere for the replacement tips, and finally wrote Wacom to ask where I can get replacement tips from. They gave me a link along with the SKU number to find the tips. Who searches for items by their SKU numbers? Along with the link, they told me the tips were out of stock and gave no option to order them and to ship when received. It's been over a month since the tips have been out of stock and I don't think I want to buy another pen of which I need to replace monthly. Pure disappointment.

Link to the Replacement Nibs: [...]
1789602
These pens are my absolute favorite, but after having them less than a month, only three of the pens are still working! Not sure why this is happening, but I am definitely returning this item.