it's available since yesterday if i'm not wrong and i think the game looks great and as xbox-arcade game, it seems to be worth the money for that size:
"The world of Dust is overflowing with hidden treasures, secret areas, and a series of challenge maps designed to test your skills to the max. It'll take most players 12-15 hours to roll the credits while doing a minimum of exploration and backtracking, while completionists who want to 100% every area can easily push past the 20-hour mark, lending Dust: An Elysian Tail immense value for its $15 price tag."
so, does anyone have it and can give some impressions? have no points atm and will maybe buy some for it.