I have long wondered whether I, as a staunch original accessories buyer not leiber the Olympus FL600 treat myself, but this one is for my purposes more than adequate and works perfectly with the OMD-EM1 together. I also find the service with the rotating wheels very good and practical. TTL Auto and ensure good illumination even by bounce shooting or with the included diffuser. The video light is a bit weak but I use them hardly more than search light when it's dark z.Bsp. in the camera bag! The flash harmoiert perfectly with the size of the OMD. The first unit had a defective and had to be replaced by Amazon. Compliments to Amazon, faster and less complicated exchange 1 A service !! Highly recommended accessories!