Now the flash: Especially a bounce flash it did to us, because the recordings, especially of persons, more natural look and the flash is so soft. For the price, the build quality could be better, because the flash is not dust and splashproof. Otherwise, we are more than satisfied with the initial results. It only requires 2 AAA batteries or AAA NiMH batteries. As the last in flash, we can not say yet. He is plugged hardly noticing, because it is very easy. You can fold down him and he is hardly noticeable on the camera. If you turn off the camera, the flash goes off too. Otherwise, it is off with the kickstand and off.
He has a message function that allows the guide number is 20. He may have to default, the guide number 14. And he has the direct function (ie direct flash) or the bounce function (bounce flash at an angle of 75 °). Comes complete with a small cloth bag, so it can be stowed away when not in use.
Buy recommendation when we still photo layman and one yet to come "exercises" flashing. And because it is also for the A58 at present still no wide selection of matching to the hot shoe flashes. Compare prices recommended. Matching camera models can be found on the Sony website.