Certainly nicer than anything I've got
Very bold design and well executed. The en suite carved accents are well done and make for a nice set. The stitching is even and the most of the edges have been edged, dyed darker and polished.
Now, on the critical side, I'm not a fan of big "catchy" stuff on my arm guards, like large antler buttons or knife sheaths. Also, aesthetically, I'd prefer to see the sheath sewn on rather than riveted on. While some people might prefer the accent of the rivets, that kind of attachment is one I associate with labor saving since it is quicker to do rivets than it is to hand sew. Now, it could be the rivets are to keep the knife from unexpectedly cutting through the leather stitching, though usually you protect the stitching by using a leather bolster, though I can see why the maker might not have wanted to build up any more height by adding a bolster to the sides wet molded sheath--this being an arm guard after all.
Also, I'm not a fan of decoration where you can recognize the specific stamping tool such as the border stamp used near the edge stitching. Unlike the carving of the feathers where only the design is noticeable (and not the tools used to make the design), the border stamps look like, well, border stamps. Also, the initial stamps look like, well, initial stamps just sort of floating there.
On the quiver, the leather straps holding the D Rings have been attached by the edge stitching. Unlike fabric, sewing weakens leather like perforating paper. Perpendicular sewing on straps especially so, so the attachment of the straps is not ideal structurally, however it is probably more than adequate for the light load the straps will receive.