The DSC-W70 isn't one of Sony's better models. From one review (linked below)..."Shutter lag: Full autofocus shutter lag is sluggish, at 0.74 second at wide-angle and 0.86 second at full telephoto. Prefocus shutter lag is 0.205 second, markedly slow."
Also, image quality doesn't seem too good either. From the same review..."As much as I liked the compact size and feel of the Sony W370, the more I used it, the more its limitations cramped my style. Sure, it's better than a cellphone and it can take those cool Sweep Panoramas.
But it took some lousy pictures (see the Gallery). I've gotten such better quality images with other Sonys that I was very discouraged. Landscapes and sunsets were usually disappointing while macros were generally out of focus. Even when images are in focus, high contrast details are ringed with sloppy noise that just doesn't look good, even at ISO 80. Very strange.
And that's the bottom line on the Sony W370: it's nowhere near as good as it should be."
So...I would reconsider buying the DSC-W370 if I were you, because ultimately, it's image quality and performance that matters the most.