The Omni-Bounce creates a diffused bare-bulb effect, giving even coverage across the entire frame with lenses from 15mm to 200mm (35mm format equivalent). The Omni-Bounce is easy to use and goes onto and off of your flash in seconds thanks to their specific custom design (except OM-UNI), and NONE of the Sto-Fen Omni-Bounce units require Velcro to be stuck to your flash head.
So-Fen diffusers are designed for years of service with out the bulk of alternative products.
For the full Sto-Fen Omni-Bounce compatibility chart, click here.