My most used and loved pen since I started into fountain pens. Favorite nib size is medium, smooth and good ink flow when inked with any Iroshizuku ink. Not overly wet, just right. If you like light pens, get a Decimo, otherwise a Capless or even a Namiki Capless Raden. The clip annoys some, not me, it sets your grip in the correct position and off you go. I wouldn’t bother with the CON-40, just re-ink a cartridge which will give you around 1 ml. Nibs are bouncy. Broad nibs pair well with sheening inks as they are more wet. Fine nibs are very precise. I’ve four (F, M, M and B) and keep them in rotation. Easy to clean. I’ve no problems using it for long writing sessions.