This is for the new version. One could call this a "nice" and green fragrance, but there is something really sour and acrid about it. This aspect is somewhat similar to the way a green olive tastes. Floral notes keep it from going too far in that direction, fortunately, so unless you really dislike that element, this is worth sampling. Also, the harshness of it doesn't last long. Then the florals become more pronounced, though with an "edge" due to the violet leaf. There seems to be enough complexity and dynamism here, and it's reasonably natural smelling. The oakmoss and tonka soften it up nicely. Socially, this is more formal or for the office by today's standards, and not for the young who want to "smell like everyone else." The quality to price ratio is excellent on this one, but it's not for everyone.
UPDATE: I now have some of the vintage version (French Fragrances). The sour neroli is strong here and lasts longer. Overall, it seems lighter yet is sharper, with better note separation (not necessarily a good thing if you don't like some of the notes). The reformulated version I have lists oakmoss and I don't think the oakmoss content was dminished substantially if at all. Rather, it seems that the sage and vetiver are stronger, along with the neroli, in the original. The new one feels thicker as well. So, if you want the smooth version get the new one; otherwise get the vintage if you can. I'd also advise making sure that whatever version you buy you make sure oakmoss is listed, unless you don't want it of course.
UPDATE #2: I recently obtained a 1980s bottle of Grey Flannel. It's a sealed spray bottle so it was not tampered with. It says Cologne and New York on the label (Paris is not listed). The label on the bottom says it was made by Sanofi Beauty Products (New York), and there are no symbols like you see on bottles from the 1990s. There is no super-sharp violet leaf but instead the bergamot is really strong. I can't remember any scent with such strong bergamot, actually, and my guess is that the idea was to balance the violet leaf with this tea-like quality, which is largely missing from the other two formulations I tried. This strong tea impression lasts perhaps a couple hours then the drydown is much more subtle, and nicely balanced (I have a feeling that some of the violet leaf note deteriorated over the years) I also have a small spray bottle of a non-EA formulation and the newest, EA formulation, and all three are clearly different, the newest being denser/thicker, less sharp, less natural smelling, less note separation, but a decent "cheapo" still. In this case, wearing a spray of each at one time would be worth trying. However, I will admit to not being the biggest fan of this scent.
NOTE: If you want a version closer to the original than the EA one, try to find a bottle that has French Fragrances of Miami, FL on the label that is on the bottom of the bottle.