This flash has won me over for an affordable and long lasting flash. 4 Duracell Quantum batteries lasts me the whole day with still a 1/3 of juice according to the duracell power indicator. It comes with a snug case and the buttons are easy to follow with a clicking feedback. The test flash button is actually a button unlike the competitors (Yongnuo ahem)The flash works just as nicely as my Yongnuo flash which is a pretty well known after market brand. I think K&F is up there in terms of quality and shouldn't be underestimated. Keep in mind this is a MANUAL flash meaning you must adjust the light's power in accordance to your camera settings.I'm currently shooting with a Sony A7S with the occasional photography job and this has held it's weight throughout the day. It's also been used with a Canon 60D and a 5D Mark III so compatibility isn't an issue with this flash.Overall, I think K&F made a better flash than the Yongnuo flash in terms of design but overall they're both really great flashes. I'd pick this one just because the buttons have a click response which helps a lot since you're using those buttons all the time.I received this product in exchange for my honest opinion. Hopefully this gives photographers like you some insight on what flash you should buy!Hope this was helpful. I'll update my review as I continue using this flash and report any issues as they come.