As is usual in most parts of Europe and Asia, Benefit didn't bring in the darker shades, so 03 Deep is missing. But here are swatches of 01 Light and 02 Medium:
01 Light would probably be my shade if I had to pick a colour from the range, and I'm about NC20. 02 Medium looks to my eye to be around NC30-35, maybe.
One of the reasons why Boi-ing is so popular is because it's very pigmented. So it's probably useful for concealment of blemishes and undereye circles. These swatches were probably a couple of swipes, and you can see that the coverage is excellent. The consistency and texture of the concealers was also good - they strike a nice balance between pigmentation and a texture that glides.
So do you need this? Well, for one, 3 shades out of a gazillion human skintones means that not everyone will be able to find a match, which would make the question moot. But if you do have a match, and want something pigmented, then these are worth looking into. But of course, weartime would vary from person to person, so that may be the deciding factor in the end.