K&F Concept Flash Speed.I used this product with my canon still camera, photo attached.Build Quality.Its medium quality material but is perfectly justified for price. I have seen Sony and other better quality but there are quite pricey. It is made of good plastic material.Usage Experience.• It was easy to fit on the cannon camera.• It was ready to function straight way without adjusting settings• Big LCD Screen to display relevant information• Its manual is well detailed, you can use the level of flash throwing out considering the distance and light of object and surrounding and yes to save battery life too.• There is a comprehensive guide book but I normally prefer to learn while using it :)• Good for beginners, small parties, outside and well lit areas with short distance.• Fully tilt function to focus your light and control the amount the light of flash you throw considering other objects while photographing• I had no speed issues with this flash using my cannon camera.• I took a lot of pictures in many different settings and I never had any heat up issue, I can see it’s a good quality product at this early age.Negatives• Its not like top built quality but it is well worth compared to price.• It's good for starters with short distance photography and well lit area• I had slight compatibility issue with one of canon camera but it was not a massive issue.ConclusionIt is an excellent product for new users or short distance well-lit area but it has given me an excellent photography experience. I also shared this product with my colleague who is a professional photographer. He highly recommend this product to me for my personal and holiday use. He could not find any fault but he recommend some extra accessories and some tips to get best out of this Flash.I will give 4.0/5 compare to big flash gunsOr 5/5 as value for money.