I used this new travel diffuser for the first time this morning, so it has not undergone heavy/regular usage yet so I'm not giving it five stars just yet. I have shoulder length, fine, curly hair that takes about 5 minutes to dry completely with a diffuser. I used this collapsible diffuser on my new travel dryer (https://www.amazon.com/gp/product/B0041QZOF0/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1), so I can't speak yet to how well it works with other dryers. As others had suggested, if you shove the diffuser on as far as it will go, it works well. It does collapse easily if even a little bit of pressure is applied to it while drying, but I think with some time and practice it will suit my travel needs beautifully.

My hair dryer end is 2 inches wide so it was a little snug and had to work to put it on at first. (Mine is outside the recommended size) Now it fits fine, stays on. Works great after getting used to it. Will be using it for travels soon. It won’t take up much space in my luggage.

I was looking forward to this diffuser fitting many different dryers, as some reviewers experienced. I, however, did not have such luck--it was too small for the first 2 hair dryers I encountered in my recent travels (believe me I tried forcing it over the too-large nozzles!!). It did fit the third dryer though and worked fairly well. Definitely does not give the same results as a rigid diffuser, but it does an acceptable job if you are fortunate enough to have the right size dryer :)

Good quality, perfect for travel or even space saving!

Great quality product. Folds down to a very packable size. I’ve used it on 4 different hair dryers so far including a hotel one and it fit them all.