Got this as part of the keyboard bundle with the M-Audio Code 49, fits perfectly. The bag is well-made and feels like it can take a bit of a beating, though I wouldn't recommend it for heavy duty travelling. There is some padding there that can cushion against a light impact, but not anything more.
I like the long spacious compartment in front which can fit a thin folder and some light accessories. There is also an additional compartment along the entire back of the bag, and I'm thinking of putting some padding in there for extra protection when I set the keyboard down.
My only gripe is that the strap goes across diagonally from the front to the back of the bag. This makes it somewhat difficult to put the keyboard in as well as take it out, hence I would unhook one side of the strap first whenever I'm getting the keyboard into and out of the bag.