OK, so haven't used it on my hair yet but I have been watching lots of useful videos on how to make the most of all of the tools.
So far, the only negative thing I have found is the tools supplied in the box. It's a shame you can't pick your own! I won't ever use the diffuser so that's a waste to me, where as if there was an option to choose my own tools or even swap one or two, that would be really useful. That's my reason for dropping a star.
It all comes in a lovely case specifically made for the dryer and all of its tools. I know there is a cloth bag available to, which would probably be easier if you were travelling!