I was able to try PaperMate InkJoy Pens for free thanks to Smiley360, PaperMate and Walmart.
I tried 8 colors of the 300 RT style and also 550 RT blue style. These pens are awesome! For the 300 RT, not only are the colors very nice, they also write so easily, clean and smooth to use. The grip is extremely comfortable and the pens never slides within my fingers while I use it. The ink never smears, blotches or runs. The pens are retractable that click easily and hold.
The 550 RT are also fabulous! The writing, ink, grip, shape are all perfect. The ink never smears, blotches or runs. These pens are also retractable that click easily and hold. No callouses or sore spots on my fingers with either style.