Review (2/5): I wanted to like this...
I really wanted this to work for me as I love to travel and this diffuser would take up much less space than my regular one. Alas, it isn't going anywhere with me.
This unit suffers from the same issue as others of its kind: it collapses too easily against your head when you're trying to use it. The merest touch against your hair causes it to buckle, so you have very little control over the diffuser. Additionally, the "fingers" that protrude from the bottom don't protrude nearly far enough, nor are there enough of them, to adequately hold/lift the curls or to help separate them into a soft, piece-y style. The diffuser DID diffuse the air stream from the dryer, but it didn't facilitate styling like my regular one does. Lastly, the opening that fits over the dryer barrel is very small, so it wouldn't fit over 3 of 4 dryers I tried. (I'm also in the market to replace my dryer.)
I hope someone does come up with a workable travel diffuser. Unfortunately, for me anyway, this one doesn't cut it.