I was looking for pens to use on photographs so I tried out the sample in the store. It seemed perfect. The pens I took home however gave me uneven thickness when writing and kept dropping little dots of ink in the middle of letters. I tried each one in turn with the same result. Maybe I got an old pack and the ink was starting to deteriorate. They went back for a refund which was much more painless than trying to write with the pens.
I am a teacher so normally I avoid store brand pens from anywhere but I was interested in the .5 mm end since thats the lead I use in my pencils. I'm in love and now journal and take notes in only these pens! Grading with them isn't too great but for everything else they're definitely my new "go to".