It is really comparable to his cousin in Canon office and use. As intuitive, it is easy to use even for amateurs like me. All functions of my gun case (600D) are compatible, time to recharge between flashes is very fast (battery fully charged), it works fine in master, slave or any other functions that may be assigned to the auto zoom. Flash reacted well. By cons still no manual in French, however it can be found easily on the internet and sold with the diffuser is quite difficult to set up (just too dimension of diffuser). Finally I recommend this product if you not want to ruin you in a flash with advanced functions.
