So i went for this Flash , Because its the first Flash in the world with Li-Ion Battery , With 1.5s recycle time on full power flash as well as 600+ Flahes on Full power on a single charge , And Quick battery charging as well. Quality Build As well as Flash throw and range is nearly same as compare to nikon or canon highest end flashes , which costs upto 600 USD and you need to buy a separate $100 Pocketwizard for them as well. This only costs $125 buck with built in and separate trigger as well. Highly Recommend for professionals