Excerpt: While I loved my pop-up flash on the A700 to trigger off-camera "real" flashes, it was the biggest sacrifice when I went to the A99. I have three Sony off-camera (well, could be used on-camera) flashes through their generations, and they are perfect with umbrellas and diffusers for studio flashes. Now I have the ability to fire them. And, in a pinch, the different orientations and diffusion options on the F20M allow for quick, creative flash in-a-pinch.
Pros: Easy To Use, Fast Recycling, Lightweight, long battery life