I am a great fan of good pens and I have close to 10-15 pens every time in my bag, excluding the 2 pens which I have in my pocket. Out of those, at least 5 are Pierre Cardins. I use the roller ball and ball pens. The ball pens are better as the roller balls dry up pretty soon and can not b used properly after a few days.
The smooth writing effect of the Pierre ball pens are amazing. I just like it.