Meh...
While this diffuser is lightweight and collapsed easily for travel, it's not nearly as convenient as I'd hoped it would be. The dimensions listed for the end that is supposed to slip into the hair dryer must be the outside dimensions. There are little fins lining the interior of the connecting but that make it impossible to slide onto an average sized hair dryer. And because it collapses so nicely for travel, it also has a tendency to collapse while you are drying your hair (once you get the hang thing in the dryer, which I literally had to cut to get it to slip on the dryer). So, not as convenient as it should be.
Rating: 3 stars