I use small cameras (with small sensors) when I want portability, large DoF, and a different look (not as technically perfect as larger sensors). I am a big fan of the Ricoh GRD series. The S90 is slightly smaller (needs a custom grip). The pleasant surprise for me is the S90 custom mode keeps focal length and manual focus distance. If you like to zone focus, you might appreciate the S90. There aren't many small cameras that shoot raw and get this right. Thank you, Canon.