Just got this Lamy cp1. "Platinum coated" as it says on the little tag attached. It is a nice slim pen weighing a fraction more than my Lamy 2000 (24g as opposed to 22g). As I got it from a real bricks and mortar (department) store it is a medium nib. It seems to be the same 14K gold nib that the Studio Palladium carries. I have always liked that thin gold edge to the slit. But now I finally have one for myself I have ruined it by inking it with legal lapis. As you can see from the picture below, nib creep reigns!
The nib is just what you would expect from a medium gold Lamy nib. Very smooth with good ink flow and no skipping at all. The only slight gripe I have with the pen is that the lid has a very tight fit, and because it is so slim it has to be slid on quite carefully. And tugged quite hard to get it off. But that would presumably be a plus point if I carried it around by the clip. Which I don't.
Oh, and another one - the platinum coating is a bit prone to showing greasy prints, although it polishes up nicely and very easily.
I am very pleased with it. It is neat and pretty and very shiny (dare I say it) a bit girly. But most importantly it is a delight to write with, as Lamy gold nibs always are. I havered for ages over the studio palladium, and I think I am glad I got this instead. I have quite small hands and it suits me a bit better than the studio shape.
Oh yes, apologies for the not very good picture - photography isn't my strong point.
Edited to add apologies!