One thing that looks good to me is that all four flashes appear to be basically, the same. I think there's a lot to be said for having "the same, exact flash" times four, or five. We now shoot digital, so 100 Watt-seconds in plenty of power indoors with the new d-slrs that make 200 ISO images that look like Kodachrome 25 ASA slide film. But the other thing is that identical units have the same power, so ratios are easy to establish, and it's easy to set one at Full, another at half, and then the weaker lights at say, 1/4 or 1/8 power, maybe even 1/16 power.
You also kind of learn what setting does "what", with your lights, in your studio area...you kinda develop a feel for how powerful one light is with Box X, or with Reflector A, and whatnot. For almost a decade, I had only three of the same, exact light units. Brown Line M11 units. And it kept the learning process very simple, by eliminating variables.
Have fun with this new stuff!
Oh, and the next video soundtrack song: The Macarena? Maybe? Or, Who Let the Dogs Out, by Baja Men?