Heck, SACD players are rare these days on their own (esp outside of Japan). My guess is this is a competitive product for someone who is in the market for an SACD player.
Hen's teeth are pretty rare too, but I wouldn't pay more than the going price for a pound of chicken thighs for a bagful.
I think Amir's video conclusion was fair. If you need it, it's there, and will probably satisfy you, sonically, if you can afford it. But for the dollars, considering it's electrical performance, there's not much to be happy about.
What I don't really understand, in this marketplace, is the pretty uninspiring 'black box' cosmetics of the thing. You'd think that Marantz could have spruced up the outside a bit. It's not like they are giving it away. It has all the cosmetic appeal of a five hundred dollar AV receiver.