Nieman has never had the body wash in stock. But I have tried the bar soap and after shave balm.
While it is hard to justify the price, the soap and balm are top notch, high quality. I would say both help extend the scent a bit if that's your concern. It just adds a little bit to the overall effect. If the gel can double as a shampoo, it might add quite a bit to the scent.
The AS balm is downright opulent. You can feel the quality when it hits your face.
I belong to another forum wherein a few people use the GIT shave soap and they marvel over it as well. (But while the shave soap is infused with the GIT notes, it has little or no lingering scent).