Can be used with the Cannon SL1 if you need a little more flash or diffused flash.
Works great, has a good coverage area and integrates well with my EOS-M camera; Has a diffuse with it that is great when you don't want harsh flash
Two issues; 1 it uses AAA and not AA batteries; two it does not telescope at all so it is a little limiting on my SL1 when I want to use a better flash than the built in unit