It came our really nice, I like the metal in the handle, nice contrast.
With the saya I prefere your sketch a lot over the actual product. The proportions look much sleeker there. In the real version it really “thickens” the blade a lot in every direction which takes away from the nice proportions of the naked blade and makes it look very bulky. Especially that the lip on top of the knife (the “spine”, if that is the correct terminology) is so big disturbs me a bit (this detail is much less pronounced in your sketch). But I guess that is a compromise to not have a weak seam at the top.
Maybe a “top loading” sleeve would be interesting? It would keep the design feature of the continuity of blade-“spine” and handle on the top while simultaneously put less stress on the edge of the blade because you don’t need to slide it in and out. Maybe in combination with some magnets it would give a more magic feel - not a big fan of that release button.