Stunning piece.  And it would have been perfect, except for one critical flaw as I perceived it: Historically, I've hung metal artwork using Ook picture hangers using the artwork's provided mounting holes.  In Riley, there are two mounting holes, but for me, unfortunately one of the mounting holes was facing UPSIDE DOWN (i.e., was blocked by a metal "branch" on the top of the mounting hole, thus preventing an inserted picture hanger from laying flush against the wall), so alas I couldn't use that mounting hole.  So, I applied a few more picture hooks to branches in the defective hook's surrounding area - branches which individually weren't strong enough, but when in combination, fit the bill.  Ideally I would have liked to just use the two provided mounting holes for an unobtrusive look, but with the aforementioned jury-rigging, all turned out fine in the end.