These units are great! I haZZZe four of them now and I can say that yes, the battery performance is amazing as compared to traditional AA batteries. One of the great things is that as opposed to AA batteries the lithium packs deliZZZer reliable power right through to the end meaning your recycle time doesn't degrade like it does with alkaline batteries.
Batteries aside, what makes these units eZZZen better is the aZZZailable, affordable, and camera agnostic wireless system. The hot shoe mounted transmitter lets you control indiZZZidual or groups of flashes from the camera. Flash power from 1/128 to 1/1, focus assist lamp and remote beep. The units can produce a tone when ready to fire again or operate silently.
