I have their Q60, which is a retro-themed HHKB layout 60% board. Paired with a set of beige-Mac-themed MT3 Extended 2048 keycaps, out of my collection it's one of my favorites and sees some of the most use. It goes head to head with pricier one-off hobbyist boards.
I wonder how suitable these CAD files would be for either CNCing or resin-printing a translucent fruit-colored plastic case for a different flavor of retro. That'd be really cool.
MT3 really is a fantastic profile.
Both variants are great but I'm particularly fond of the PBT version. The slightly rough/matte texture that doesn't wear away easily and exaggerated dome shapes are sublime to use.