I love the feel of stainless steel on this pen, and it seems sturdy, but the cap can take quite a bit of strength to remove. Refills are not hard to come by online if you know where to look. The pen writes just as good as Sharpie's Ultra Fine Point Markers, which is the main reason I bought this pen. The operative word in this product is PEN, it does not write permanently like my Ultra Fine Point Permanent Markers on clear tape or other surfaces. If you try to write on slippery surfaces with this pen then be prepared for smudging. I really think Sharpie needs to introduce a stainless steel version of the Ultra Fine Point Permanent Marker or cartridges that convert this pen into a marker. If your looking for a Sharpie pen this is it, if your looking for a Sharpie Permanent Marker with a nice fine tip look elsewhere and why it only gets 4 stars out of 5.