Dptips :. Digital Photography Tips, Tricks, and Techniques

Here are some results from the Photography-on-the.net crew: click

Much of it is preference and how much room you have in your bag. Remember the bigger the light source the softer the light. Omnibounce units can only do so much, since they are limited to low, white ceilings.

Stofen Omnibounce and Vivitar 285HV Side by Side

Updates:

Stofen Omni Bounce Pros and Cons
For those who are adamant about getting a Stofen Omni Bounce should know the pros and cons:

The advantages:
-Custom fit to your flash - no velcro, no tapes, no gunk on your flashgun if you’re trying to sell it at a later date.
-Small, lightweight - you can leave it fitted to the flash when it’s sat in your bag, and have it ready for action as soon as the flash has charged up - no messing around assembling something more bulky
-Simple, effective - just pushes on and then it works.

Disadvantages:
-Custom fit: means you’ll need to buy another if you change flashgun
-Small: may not be as effective as some larger diffusers on the market
-Simple: No real flexibility beyond the angle at which you choose to bounce the flash.

Gary Fong Lightsphere Vs. Stofen Omni Bounce
posted by Nikonguy2 on Dpreview:
The Stofen and Lightsphere are but two of the many diffuser reflector adapters that are available. Both work well in limited situations. The Stofen gives good results when you have the proper surface to bounce it from but works poorly as a direct flash type diffuser. The LS works wonderfully for very close portraits and poorly in other situations as Lawrence states. My personal opinion is that the original LS that has been discontinued works better than the new ones. The Ls is not the end all product it is advertised as being and most of the samples shown on the web site appear to be high ISO and large aperture shots using more ambient light than flash.