Just got my SL1 this week and have been testing it with the 40mm f2.8 pancake and 28mm f2.8 IS. As expected, the images are great and the handling and performance is like any other entry level DSLR. I brought the SL1 to complement my motorsport photography work where I use a 5DIII + 300mm f2.8L IS II (or 70-200 f2.8L IS II) for telephoto shots and will use the SL1 + 28mm f2.8 IS (effective focal length ~45mm) for standard lens shots of static images such as the race track environment, people etc. This way I won't have to waste time changing lenses on the 5DIII. Also, I don't want to buy another 5DIII or 7D for this purpose due to weight, size, and cost restirctions.
The SL1 is also a great compliment to my other camera gear since the SL1 is lightweight and takes up minimal space in my bag, while still retaining DSLR features that I like (e.g. optical viewfinder, entry-level performance, form factor).
The SL1 will also be a back-body body since it is compatible with all EF and EF-S Canon lenses. Plan to put my 300mm with 2x extender III onto the SL1 for an effective focal length of 960mm for those really long shots ............., should be interesting!
Finally, for when I just want to have a small camera with me, I'll take the SL1 + 28mm (or 40mm) with me. Recommend giving the SL1 a try, I think you will like it.