What flash diffusers have you found to be the: 1.) Easiest to use. 2.) Most effective given the ease of use. 3.) Most portable as far as space and sturdiness so they don't get mangled riding in a crowded bag.
I have included a Lumiquest Pocket Bouncer in my walking-around kit, which seems to be a good compromise between performance and wieldiness. The extra height eliminates red-eye, too. On an AF280T I still get enough light from it in most situations, although a camera with TTL flash support and the consequent ability to open the aperture right up is very useful.
S
