Preston,
I get over 1,000 shots out of a charge with 2 AB400s and a recycling time of one second when fresh and 2 seconds near the end of the day. It makes for a very good location setup when you can't run power cords to building AC.

I also use the setup for outdoor portrait sessions where I want to have maximum control over the lighting i.e. late afternoon beach shots with the sun setting behind the model. The Vagabond II is simply a great product, fully portable that functions as it should. Paul Buff makes excellent products and he knows what photographers need.

Now, the 400s may not be as powerful as I'd like but the fact that they aren't makes the recycle time and number of shots so much better. I'm shooting at F8 most of the time at ISO 200 so I have not found them to be ineffective for what I primarily shoot.

Jim