As mentioned, it's easy to make for very cheap ( and making it is about as complex as adding creamer to coffee), but it's quite a pleasant smell. The spiel that accompanies it is somewhat BS, but the way it works is that it's a very large molecule, so it sticks around forever (especially on clothes). Consequently, the wearer becomes anosmic to it very fast (it seems like its gone), but others can still smell it on you. Also, as your body temperature changes, you'll catch whiffs of it -- which is where they get the whole pheromone story from.
The molecule itself is already in a number of fragrances, and works really well as a fixative for a blend. While the price of this is outlandish given what's in it, I do think the marketing and artistic aspect of it was quite brilliant. It still sells very, very well -- even when people find out that there's nothing to it. And there's something to be said for highlighting a such a major component of the perfume industry in such a way.
Personally, I can still smell it after application -- but it depends on the strength of the batch (I usually make vials of it). I believe Molecule 01 is 20% ISO, but you can bump that up a little more if needed. You don't, however, need to blast this stuff.