The smoothest pen I own! The writing experience is just divine. I got the Black colour in Medium nib. A good quality paper is a must since the ink does have a strong flow. Would also recommend an ink which is does not feather easily. I would recommend watching youtube reviews of this product to get a full scope of this pen. One of the drawbacks of this design is the ink levels are unknown; also it does not have a large ink capacity. This is expected of the design since its a pocket pen.
I travelled a few times with this pen, took it to conferences - a wonderful companion. Would highly recommend.