I needed a small capped pen for field use, this fits the bill perfectly. Simple design, no worries about accidentally actuating it inside a pocket or pack, or the ink drying out. The clip is very sturdy. The refill is very nice, bold and wet. I replaced it with an Ohto refill because I like a finer line, but still enjoy the low viscosity of rollerballs if I'm not using a fountain pen.
Here's an affiliate link the the Ohto refill, if you need a fine refill: https://amzn.to/45Hin51
I couldn't find a better option.
Buy this pen, you'll enjoy it, and there's nothing else this good at this price point.