Omega, this is quite a nice and seldom mentioned oriental style fragrance from Cartier . I like it, but don't pull in out enough. I went through a decant of it, but decided I don't need to hang onto my bottle. I think I just prefer the regular Must de Cartier pour Homme more.
Despite prefering the original more, I still think L'essence is really well done. I get this elegant vanilla/tonka/cinnamon combo that feels like a comforting cloud of fragrance on me. Its not too strong or too weak in strength, so that is a positive as well.
The original Must PH was a recent discovery (and a lovable one, I might add) which I had hard time to find and buy online. I really love its smoothness, its kind of 'oriental' barbershop feel which gives the wearer a nice aura of debonaire. I never tried Essence version, but from what I've read I'm sure I'll blind buy it without any hesitation. Congrats on your choice.