I never thought I'd be excited about a piece of plastic, but this little device makes the results from the Speedlite flash 10 times better. It totally eliminates the glare and the harsh shadows associated with the the pre-diffuser era. I've been delaying buying one for a while and now my only question is 'why didn't it come with the flash in the first place?'.If you have a Speedlite, you must get one of these things! (A cheaper alternative is to tie toilet paper around the flash and secure it with an elastic band, FYI).