I took a chance last Fall and bought one of the lights you see above. I'm sure it's make with a different design skin under a number of different brand names but this one is Neewer Vision 4. It's a 300 watt second unit with a nice lithium battery, a simple wireless remote, a Bowens accessory mount on the front end and the promise of "Designed in Germany."
When I bought the first one I did so with much trepidation for about $279. Over the course of the quarter the price eventually fell to $219 and I bought two more. I've used them extensively indoors and it's nice not to have cables strewn about. But their real strength is in outdoor work.
I was photographing on a golf course yesterday and I had one of these lights on top of a good light stand, secured by a 30 pound sandbag. I'd created a little exterior working area where I could photograph golf professional, Zach Taylor, doing a grip-n-grin with about 50 people. The flash had an inexpensive 47 inch Phottix umbrella softbox on it as a modifier. I triggered the flash with the included and very simple flash trigger connected to the hot shoe of the (currently on probation) Nikon D700.
The flash worked well and the shoot was relaxed. The only iffy part to the day was the constantly changing wind. Sometimes it was wicked and gusty while other times it was mellow and constant.
The flash did exactly what it was supposed to do over and over again. The unit I was using is the first one I got and now has logged well over 10,000 pops. The idea of this kind of flash at this price was unthinkable just five or six years ago. We can talk about the extra finesse or precision of Swedish or Swiss brands but after having used most brands of electronic flash on the market I'm amazed at what a bargain these lights are and how consistently they've performed.
As I mentioned when I discussed these light previously the only thing I'm not thrilled about is the 30 second duration of the built-in LED modeling light. I wish there was a way to change the duration or to leave it on all the time. I know it would drain the batteries quicker but the convenience of an "always on" modeling light would outweigh the slightly shorter use cycle between charges. Plus, if I am only using one unit on a shoot I've got two others units from which to borrow batteries. With three batteries I should be able to shoot something like 1500 full power flashes a day. I can't think I'd need more than that....
Nice to be able to position my light right next to the golf course and fire away with abandon.
Just checked, the current price is $179.99 on Amazon. About what I would pay for a generic hot shoe flash.....