This is a really nice case, fit my YPT-300 like a glove...The only problem I had with it was that it didn't fit my car trunk.  I had measured multiple times, but I think that the outside measurements don't include the wheels.  If the wheels were more like suitcase wheels (you know the kind that are rollerblade wheels that are inset to the case a bit) it would have worked for me, but since the wheels sit completely out, it didn't fit.  I'm very sad having to return it.  One more thing you shoudl know about the case.  The YPT-300 weighs next to nothing, but this case adds on a bit of weight,  I don't know for certain how much but I'd say between 15-20 lbs total.  While the wheels help, they don't help you going up and down stairs, but I can generally find someone bigger to handle that part.  If I still have this keyboard around the time I change cars, I might buy this again.