Not sure what's expensive in the amenity kit other than the small bottle of cologne. However in my opinion, the most recent cologne in the F amenity kit smells atrocious and too smoky. I feel like I am nauseating the entire cabin with just one spritz after my shower.
I've just been using the other cologne thats in the shower spa recently.
One of the previous Bulgari cologne iterations, I believe it was Tygar, smelled great though.
The most recent one I got (it says le Gemme and Kobraa and it was in October) is very strong. You can sort of smell it through the glass. But I quite like it.