I have one of the Casio Exilims. It is incredibly small. I can keep it in my shirt pocket and forget that it is there. It also has a 'rapid on' feature, which means that from being off, it can turn on and take a picture in less than quarter of a second or something. That has come in handy a few times when I have seen a cool plane or something and need to take a picture quick. The resolution and zoom are not the best. But they are more than good enough for anything I have needed to take.