This flash is a waste of money. As a result of using this product, i found THAT it is unreliable and unpredictable .The Electronics inside the flash seem to be poorly constructed with the result that it often doesn`t fire when it should. The flash also lacks certain features that make it difficult to use in certain situations..
Easy to use - I figured it out without a manual in 15 minutes with everything myself. It is conveniently mounted, there is enough light for macro photography, several flash power modes.