If you're buying a Cannon EOS camera alongside Speedlites, cameras with "EX" at the end of the number have many more options than this one. This worked great for a simple "brighter flash". More expensive devices are better integrated into the EOS product, making them value for money. So if you're like me and didn't do your homework first, do it now. If you know what you're doing, this is a great product that does exactly what it's designed to do.