Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inexpensive diffuser - a little hard to slip on - works well

I use "fill flash" all the time when shooting portraits outdoors. That little extra light brightens the shadow under the nose and shadows under the eyes. I dial back the power to -2/3 stop with the Sto-Fen in place and it makes a nice softly lit portrait. When you consider the cost of other products (go check the very cool Gary Fong products), this is a inexpensive yet effective way to add light without harsh glare.The reason for 4 stars is that the fit is quite snug - probably a good thing - but it does make getting it on and off a bit of a chore. Probably will loosen up a bit over time but for now, 4 stars for an under $15 product isn't bad.