I've got the HB Xplorer and the size isnt a problem. Used to have on the back of my old Xt660Z and now have it on my XT1200 . Quality wise I'd say its ok but I've not seen a SWmoto one to compare to. For info its made of moulded plastic bottom with alloy sides glued and rivited with plastic and alloy top. Keys are quite small so can be fiddly with thick gloves. The hinge is plastic and in my hamfistedness i broke a couple of the hinge "teeth" though this doesnt stop it working.

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ex XT660X Tenere, now XT1200Z Super Tenere