The SP-810UZ has a CCD sensor type which is better than the MOS sensor type found on most digital cameras of this spec and age. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is in fact the best sensor type across all cameras of a comparable age and spec to the SP-810UZ.
Across similar types of digital camera the worst sensor type is MOS.
We compared all the other digital cameras that have a CCD sensor to this camera and we think the Nikon Coolpix S80 ($223.34), and the Canon PowerShot G12 ($675.12) which has better reviews is also worth considering.