I realise that this is an old thread, but having recently bought a Faber Castell Ambition, black resin version, I thought I would add a few comments. I was attracted by the stylish look and by the fact that the nib is the same as the Faber Castell e-motion, which I had found to be very smooth (although firm) and one favoured by SBRE Brown in an old "Greatest of all time" pens review. However the e-motion, dark brown pear wood version, whilst stunning to look at, was for me rather short, heavy and of too broad a girth. I ended up using it only with a Lamy Safari cap posted on it, to add length for comfort and control, without upsetting balance.I hoped that the Ambition would have none of these issues.
Also, the Ambition black resin version appeared to be appreciably better value, at £55.00, than the pear wood or coco wood versions. I was told by the sales assistant that this was "black wood" (an innocent mistake, I do not doubt) and I didn't appreciate that it was resin until I got it home.
It does feel and look a little bit like the Makrolon of the Lamy 2000. But I soon discovered that the Ambition is also a bit short un-posted, yet if you do post the cap (as is clearly intended by the stepped design), the cap makes the pen very back heavy and unbalanced. I wonder whether the wood versions may perhaps have a metal barrel lining which the resin one does not, so that the resin one suffers more than the others with this balance issue.
So, the pen seems, to me, too short un-posted but too back-heavy when posted. I could not think of a way to add weight to the section. Then it occurred to me that the solution might be to post the cap of another, lightweight pen. After trying caps from numerous caps (going through several pots and boxes of old unloved roller ball pens etc.) I eventually found the Stabilo bionic rollerball, the short orange cap of which fits on the Ambition almost perfectly. So I am back to using Faber Castell pens with non-matching caps posted. Not ideal but it is better than the alternative.
Incidentally, I do like the pattern of dimples on the nib. In sunlight, they sparkle like crystals. Also, I have found that these nibs also cope better than most at being left for a few minutes uncapped, without drying up, making the pens well suited to intermittent note-taking. You do then need some sort of cap posted, to stop it rolling around on a desk.