Review (4/5): Fits and works -- that's all I can ask for!
Works well. It's a tight fit on my cheap Remington dryer, but that means my diffuser doesn't keep landing on the floor (an annoying problem I was having with my previous diffuser after getting warped from the heat). An interior plastic piece--it fit into the center of the diffuser screen-- fell off after my first use, but it doesn't seem to be necessary to the function of the product at all, so not a problem.