Excerpt: I have several Canon Speedlight 580ex ii flashes that I use with other larger Canon cameras but was looking for something small and portable to match my new (small) SL1. This flash is the perfect size to include in the bag with my SL1. It takes up very little space and does a great job of providing lighting for the quick "on-the-go" shots I take with this camera.
Summary: So far, I have used it in a bar photographing musicians. It does exactly what it says. I'm using RAW and single shot. I'm not sure how it will do if I'm using it on a rapid fire mode due to recycle time. It did cut out quickly and I didn't have other batteries with me. Went through them quickly I thought. Be sure you bring extras.
Pros: Compact, light, easy to use, easy on and off.
Cons: Burns through batteries. Wish I could have more control on tilt degree. The available tilt settings are preset.