You don't associate mechanical keyboards with sleek portability... and you don't associate portable compact keyboards with great tactile feedback or mechanical travel. Lofree's somehow managed to blur both those worlds into a keyboard that offers the best typing experience while weighing just a poun...
I'm not sure but it seems the CHERRY KW X ULP is as slim or slimmer, while it uses mechanical scissor switches instead of classical mechanical ones they are still mechanical.