Review (4/5): Doesn't hang on well but does the job.
I bought this to replace my Deva made diffuser, which was cracking with age and didn't fit the new dryer.
Well, this one doesn't either, it doesn't have a secure connection. But I saved the very wide rubber band from the Deva one and used it to secure this diffuser and it's working.
More air comes out of the back of the hand than the front, which is odd, but it does reach into the hair to dry the interior, which is the main reason I like this type of diffuser.
So, not perfect but fine for the price.