The move to AA batteries on the new Skyport might not seem like a big deal, but knowing that you will be able to trigger your flashes no matter what will allow you to better sleep at night.
The inclusion of a metal hotshoe with a real weather sealed lever system allows me to trust the transmitter a lot more, since I already killed a couple of the old models while swinging the cameras around from my shoulder. While I didn't need it in this scenario, the focus assist light built into the transmitter worked, dare I say it, even better than some of the assist lights I've used that are built into modern speedlights.
With all of this praise, you must be thinking, "there's gotta be some downsides". Unfortunately, pretty much the only thing I can think of is the fact that I prefer to work in absolute numbers with my packs, rather than relative and the new remote doesn't seem to have an option to show me my power levels in Ws rather than the arbitrary "8.0" numbers. Using the remote in normal mode with the green backlight is great, but the contrast lessens a little when using speed mode and the backlight turns red. These are really the smallest of nit-picks though, since I can hardly find anything else to complain about! (and that's saying something coming from a brit...)
I think if you're a one-man-band action sports photographers like me, there's simply no better system than a couple of ELB 400 s equipped with HS Heads, and a Skyport HS for lighting fast-moving action due to its light weight.
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