I have used a few hard diffuser types in the past and wanted one that folded for travel, so I decided to try it. I use this on a Foxy Bae hair dryer, which has an odd nozzle size that has made finding a diffuser difficult. I have used this on a few borrowed driers while traveling and it has always fit. This is now the only diffuser I use.
I have very fine and long hair that reaches my mid back. My hair is wavy with some curl if I air dry but forms loose curls when diffused.
My favorite parts of this diffuser is the size for one. I can fit my long hair in it very well and I don't have to hold it in the diffuser like I had to for smaller ones I have used in the past. The best part is the flexible nature of it. It packs down for traveling, but it is great for helping me get volume. I can adjust the angle of the diffuser so I can always get air going in the direction I want without having to resort to drying my hair mostly upside down. The only thing I don't like is the color, but that is purely personal as I like pink the least when it comes to colors. This is the only pink item I have in my house (it can stay because it works so well), and I would definitely repurchase if this one were to wear out or break. I have been using it for over a year and it works just as well as the day I got it. If this were to be made in another color I would buy a second one.