ah, i am not buying it. someone i know is buying it. i think the application is close up flower photography. if she does i will get impressions and pass them on here.
for close up flower (or bug) photographer a used vivitar ringlight would be a better investment. they go for under 60$ on eBay all the time. They were designed for close up work. dentists used to use them then suddenly the market was flooded with used ones so someone must have designed something that dentists 'had' to have.
much better than any diffuser setup