A recent purchase for use with my two AS250 heads. Makes controlling two heads mounted at height with independent setting much easier with a very similar user interface to that on the heads. The unit is a little larger and not quite as robust as I would have liked but it does represent very good value given the price. In use there are a few things that need getting used to. When using two heads with different IDs there is a need to cycle past 7 unused IDs to get back to the first one. There is an audio on/off function (for the heads) but the audio stays on when changing the flash output up or down with an annoying bleep for each step change. The unit only has a standard on camera hot shoe fitting but with no option for the Minolta/Sony fitting of my cameras. This means that I only use it to control the head settings and I use a separate PC lead to trigger the flash.
Even with these comments the unit works well and represents very good value.