Before I go back and read what everyone else has said, I'll post my first impressions about Hothouse Flower.
It is potent! Even before I could unwrap the well-sealed sample sent by
Cestrum nocturnum 
, HF announced itself as fairly sweet and leaning toward a youngish audience. I experienced a fleeting flashback to 1960s Yardley Oh de London, but can't say exactly why -- maybe just the simple, sweet, floral nature. If I didn't know the notes, I would start guessing there might be some lilac and powdery notes. Smelling the liquid itself, I like the sharp, verdant note, which I attribute more to the cypress than the other green candidates. Up close on my skin, which often makes fragrances take an unfortunate turn, that green note heads toward the vile vegetative green goo of the garden stinkbug. The the heart notes lose the greens and become more wearable for me as I like the fig coming to the forefront. The drydown doesn't go anywhere in particular.
I might be inclined to give HF another go near springtime when certain cravings erupt with the crocuses.
The notes listed are some of my favorites, but I've learned that this hardly ever helps me find swoonable fragrances. Random sampling results in better percentages. Go figure.
P.S. ~ DD wrinkled his nose at this one. He thought Hothouse Flower might be more like Demeter's Wet Garden, which he loves.
* * *
Back from reviewing this thread ...
Kalli, thank you again for getting HF into circulation. The name would have haunted me until I got to sniff this.
Cestrum, you're looking after your mom? (Puts hand to chest.) Been there. Bless your little Cotton socks.
I can understand the impressions each of you related. Looks like a thumb-neutral fragrance.