I really fell in love with Gourmand Coquin, when I first sampled it a few years ago, and even sung its praises on the forum. However, I ended up not buying a bottle at the 11th hour. Yes, it's utterly lovely and lasts for quite a while but its sillage is very low and that irritated me after a while.
Before springing for a bottle, I would advise you to sample Mazzolari's Lei beforehand - I find it a fraction better than the Guerlain. And, if you're really on a tight budget, try Al-Rehab's Choco Musk (it's the only Al-Rehab I've tried that smells like a quality niche fragrance, as opposed to a rip-off of something else).
Although I'm currently in a position to buy both the Mazzolari and Guerlain, if I wanted to, I settled for the Al-Rehab - it's just as good, lasts 48 hours easily and the sillage is very satisfying.