I've had a very hard time finding a diffuser that will fit my narrow blow dryer. This does!! It did a good job, but not great. My beautician always gets my hair so curly when she uses a diffuser. When I tried this it was just wavy. I may need to experiment with styling products for my desired look. I thought the size of the diffuser is appropriate, not overly bulky. It also seemed to prevent over drying to my hair, which seems better for it. Overall a good product for price.