Not the best option for travel
I like the idea of this diffuser; however, it has not worked for me.  I purchased it primarily for use when traveling (as hotels never have diffusers).  Unfortunately, I have not yet found a hotel hair dryer that will accommodate this diffuser.  The opening, while flexible, does not stretch and will likely not fit over the end of any portable-style dryer.  Out of desperation, I've tried holding the diffuser close to the dryer nozzle with my other hand and noticed the diffuser collapses very easily.  In short, it simply doesn't work well for travel.
Rating: 2 stars