I often use bottled inks with my Lamy Fountain Pen. I had some issues with the ink clogging up and leaking from my pen. After seeking advice, I was informed that Noodler's ink does not play well with these Lamy Fountain Pens. I was recommended to use a better flowing ink such as Pelikan 4001. Overall these are great pens; just be aware of the bottled inks that you use with them.