1. (and equal to the main point) - it does what it should: scatter light and thereby bring the white balance of the camera is not totally out of the concept!
2. He should fit: this is due to the already mentioned elastic of course - he was supposed to all available on the market lightning fit (in my Speedlite 430 EX II)!
3. Do not be too expensive! Here beats the big moment of the BIG flash diffuser-coating, because for the price you really can not complain about it now!
4. it should be easy to carry! Well, fabric is foldable, rollable and folding and weighs almost nothing - any questions?!?
5. Durability should be can ave! To this end, I can not say anything, but I think that he is not less durable is under careful treatment than his opponents of rubber or plastics and if he but eventually should SILENCE his service, I can at the above mentioned price with a smile so far in order a new face!
So I can do it for the little "big" BIG only give a review - full marks !!!
Thank BIG!