I have this game but my wii won't read it. I thought it might be the console but it also does not work on my wii u, the disc is in mint condition so I'm not sure why it doesn't work..
If you have Super Smash Bros Brawl, Metroid Other M, The Last Story, or Metroid Prime Trilogy, see if you have issues loading those games, as they are all dual layer. If those load fine, then it is definitely the disc, and Nintendo should do a free replacement.
I'm playing a little of this game an hour at a time, and I'm laughing at the random battles. The characters might as well be soccer hooligans from East London or something.
Xenoblade just recently moved back up to the top of my playlist, and while I used to find the VO's during battles annoying, I can see the charm in them now.
My biggest problem I'm having (which is why I stopped playing most RPGs years ago) is my OCD questing. I haven't made much progress in the main story line, since I keep getting new quests tossed at me every time I play. Granted I'm still really enjoying it, but it doesn't look like I'll finish it under 100 hours at this pace.