Upload & Sell: Off
I have one. My wife really wanted it, and since I am usually the one who gets all of the toys (and since it was on sale for $420), I got it for her.
We have had it since April or so, and we have only used it a handful of times. Granted, we got it for to use in her boudoir work (which she has not done a ton of yet), so I never had the idea it would get a ton of use in weddings.
WHat I like about it: Great even light that balances well with natural light across all of the power settings. Holds a charge well. Can be used plugged in. Has a tripod thread mount
What I do not like: The light goes everywhere...not direct-able. I am used to strobes that have more direct light, so the spill is annoying. It is not super powerful and the light falls off quickly. One of the few times we used it in one of our cool shots the light had to be c. 12 inches from their head and I had to photoshop my wife out
On the whole, I think the rarity that I use it shows my opinion more than anything. If I could get the thing for $300, I would consider it. For $500 it's just not worth it to me with how I shoot.