Sarasa 4 + 1

I got the 0.5mm blue-green version on something of a whim and it's been a pleasant surprise. For being only $8.00, the pen feels quite solid and has been perfect for on-the-go note taking. The grip is a little wide for me, especially compared to my Coleto me 4 colors barrels, but it'll probably be perfectly fine for anyone who doesn't have really small hands. Bonus: unlike the Zebra Prefill Barrels, the Sarasa seems to fit Uniball Style Fit gel refills, so you can have Uniball's ultra-fine tips with the Sarasa's ultra-cute design :D

I bought the 0.5 mm version in pink, and for a 4 + 1 pen, it's surprisingly slim and comfortable to hold. All of the colors write smoothly, and the pencil mechanism works well. So convenient to have everything in one pen! The argyle pattern is pretty, too.