I love KAT.
I got the Black on White. The caps seem like great quality. Sounds great and feels good. Legends look pretty decent.
The only issue is that the color is not exactly white. It's has a significant blue tint to it. Almost like a dentist white. Just ran through my house comparing the white of these keycaps and there's definitely a tint to it. I can't imagine this matching well with any white keyboard unfortunately. Might look ok on a non-white board.
I never tried or heard of KAT profile before. I really enjoy typing on it. I purchased this modifier set because I had been gifted a set of the alphas, which I feel in love with. I also really like that the alphas are mono alphabet, not dual. So if you want japanese/korean/russian you don't have the latin alphabet alongside it. Really fun and unique! I'll probs be back for more alphas and modifiers. Thanks!