Review (5/5): I'm In LOVE
This is one of the best diffusers I've ever used. I works great with my regular hair dryer and also fit neatly on my much smaller travel dryer. LOVE that it collapses for both regular storage and travel. Truly thinking about ordering backups in case something ever happens to this one. The plastic disk does come loose from the edges of the rubber cylinder, but there are groves in the side of the rubber to hold it, and it is easily popped back into place.