To me it's not about the most ostentatious scale, file work, extravagant jimps, crazy inlayed tangs or size of razor. I find that simplicity is best represented with Iwasaki size 1 ( size 2 meant for heavier set beards and 2x price of size1 ). Where the function of razor supersedes fashion.
In spite of the few razors I have, this maybe too presumptuous but Iwasaki is indeed an impressive razor compared to my shaving arsenal. This along with the Livi J-spec inspired razor are ones I've been using of late.
Craftsmanship: Japanese culture value asymmetry and refer to it as Wabi-sabi
Front and back of razor are blackened to help reduce rust ( does not prevent )
Balance: excellent balance very light in comparison to other razors I shaved with. Total control of the razor. You are essentially "one" with the razor. I know it sounds cheesy but that's how I feel. There's a saying "Jinba-ittai" rider and horse are one. From shaving standpoint, the Iwasaki exemplifies this saying. Granted it's only designed for someone else to shave you with but with preparation and respect of razor, you will find this will give you one of the best shaves second to none.
Collectability: If you love razors in general or would simply like to try something out of the norm, this would be great addition to your shaving arsenal.
Price: For such an exquisite shave with simple yet functional design-it definately is worth the price. You won't regret it.
Overall: You can take my review with grain of salt as I've only been shaving 2 months. Still there isn't a shadow of doubt as to quality and craftsman work of Iwasaki. This literally "chased hairs" away from my face! Highly recommended.