I use my knife as a work knife and it can easily slice through heavy duty ratchet straps.

Stays sharp

I've been eyeballing this knife for a long time and I finally bought it. Very cool knife, well built, extremely smooth action and lock. The only complaint I have is that the pocket clip doesnt really match the style of the knife and it has a different finish from the rest of the steel.

If you're wondering, it is fairly awkward to open, but quite fidgety and fairly satisfying xD

Initial impressions:
The Katsu D2 knife is based on an older pocket knife design - the Higonokami. It takes the older design and gives it a modern overhaul so it wouldn't feel too out-of-place.

Ergonomics:
It's a folding pocket knife. It's relatively compact though its a bit tall. It doesn't really feel too uncomfortable in the pocket.
The handle scales are a little interesting - they are bamboo-shaped and I can see how some might view it as a little awkward, however, with enough use, it shouldn't be too bad.

Aesthetics:
The knife looks really nice! I really like the blade shape as well as the overall handle design. It's a razor that is both striking and subdued.

Operation:
The metal tab on the blade acts as your thumb-stud or opening tool. It is a little stiff on initial openings and requires a little more force than other assisted-opening knives. In my experience, it is best use your thumb to open the knife. This will most likely get better with time.
The locking mechanism is a familiar liner-lock that will keep the blade firmly in place. It offers nice gimping and is easy to disengage when needed.

The blade shape is a reverse tanto or razor-like profile and it comes razor sharp out of the box, easily being able to cut up paper and cardboard with ease!

EDIT - Final Impressions:
After carrying this for a couple months, the knife still holds up extremely well. Opening and actuating the knife is really smooth now after breaking it in over the course of a couple days. It still maintains a razor sharp edge. And pocket carry with it isn't half bad with its tall yet slim profile. The only criticism that I have is that the pocket clip is a bit tight, but it's understandable to have a secure fit over something loose.

Considering that it's made of a durable steel and that the knife is based on a fairly old yet reliable design, I think that this is a solid purchase for the price.

Seems legit. Not much about these knives on the internet but I got the bamboo green handle one. Nice weight, nice feel, pretty sharp out of the box. Almost as sharp as my morakniv laminated carving knife but not quite. That thing is another level of nice. Katsu blade says d2 on it so I guess I gotta take its word. Seems pretty durable with the little I've used it for so far. Only reason I'm giving it a four is that the nylon case that came with it is too small to hold it. Now I wouldn't use it anyway cause most days I am wearing a tool belt most the day so I'd rather just carry the knife in that and have it ready to go. Buy to me the wrong size tells me that these knives are just not on par with true hand made craftsmanship. That said. Love the look and it does its job so I'd say worth its price. Could probably be a little less though.