Ideal for weddings reportage where we can not always "tap" on the ceiling (often too high and not necessarily white). We will get a softer light hair a flash "cheese" live. This will not replace a remote flash to a well sûr.Donc forget umbrella for the studio!
This limits the damage and helps out in extreme situations of reporting, no more ... but for the price it is convenient and eliminates the need to "tinker" a homemade diffuser.