I wanted to get this for NAB to improve sound quality and my documentary style audio workflow, but unfortunately it only became available afterwards.
The new Beachtek DXA-SLR PRO is now in stock at B&H and it has some very practical advancements over the older HDSLR XLR audio adapter that was called DXA-SLR.
The first obvious reason to use a device like this or the Juicedlink alternative is to disable the auto gain control “feature” that is always on in most HDSLR cameras. This way you can set manual audio levels even though your camera doesn’t support it.
The second reason is the chance to use XLR and phantom powered microphones. Their power comes through the cable and is provided by the device.
And the third most important reason