Great Travel Diffuser
I read other reviews and agree and when the product is heated up, it can sometimes collapse if it is pressed against your head as others have mentioned.  However, I purchased this item for travel.  So thrilled to have found something that collapses to take up so much less space than a standard diffuser.  It doesn't take that much effort/care to prevent it from collapsing during use.  For my use, that is a small price to pay for the benefit.
Rating: 4 stars