Battery life (using rechargable AAA's) was surprisingly good. I took over 200 photos some with bounce over a few hours and didn't have any issues with battery life. Illumination is good, much much superior to built in flash on my a6000. I was shooting in a large room. No one complained about burned retina's, didn't see a lot of red eye even though I didn't have the red eye feature turned on. Very Effective. Yes, I'd buy another one. No need to spend $400 on a big flash unless you have professional needs.