most cannons arn't good at low lighting if it is hand held, I have taken some great pictures with the Canon at low light but that's with a tripod, so you can lower the shutter speed. I will see lowlight doesn't apply to things like sunset shots, this camera would do GREAT for that, just make sure your focued on the light so you can get the great silhouette shapes.
It wont matter what kind of batteries you put in the camera as long as they are AA? I think that's the size, so it will take lithiums, and yeah I am used to the rectangle square box as that's what the powershot uses it it lasts days which comes in handy.
Baby, Sparta, Carmen, Henry, Hooch, Mercedes, Butterscotch