@Sounava: Just check the reviews of the M580 at about.com, steve's digicams, and pcmag. You will see it received the editor's choice at PC Mag, which rates it even above Canon's IXUS 130 (SD1400IS).
Here are some comparison shots to begin with:
CANONS 870 980 1400 KODAK M590 PANASONIC ZS3 TESTPHOTOS - Photographs from PanoramaBob, Bob Thompson | SmugMug
(Note that the Canon SD1400IS = Ixus 130. You can see the image quality is quite comparable. The author made an error, the listed camera is M590 but the images are from M580 - this can be checked by seeing the image properties. Also note that the Kodak camera has somewhat different colours - this is due to some proprietary color tweaking in all Kodak cameras. Whether you like it or not is upto you).
Some other reviews just to name a few:
Kodak EasyShare M580 Review - A Review of the Kodak EasyShare M580 Camera
Kodak EasyShare M580 Review & Rating | PCMag.com
Kodak M580 Review: Steve'S Conclusion
There are somewhat bad reviews too: From PhotographyBLOG, mainly. But you can find somewhat bad reviews about the W310 too, for example:
*www.imaging-resource.com/PRODS/W310/W310A.HTM
That's not to say that the camera really is that bad. But the fact is that PC Magazine used the Kodak M580's scores as a benchmark to compare cameras in the price range.
Heck, PC Magazine even put a comparable canon model against it and found it worse in some respects and better in other respects. In fact, PC Magazine actually recommends the M580 over the Canon SD1400IS (IXUS 130):
*www.pcmag.com/article2/0,2817,2374575,00.asp
PC Magazine said:
The $230 PowerShot SD1400 IS is great choice if you're a Canon devotee who wants a truly small camera that's easy to use and pumps out good-looking images. If you care less about size and more about features including a lens with twice the zoom factor, try the less-expensive ($200) Editor's Choice Kodak EasyShare M580.
Earlier model Kodaks were not good, but the M580 certainly is. Given the features found at the price, I would recommend it any day (the M575 is just an M580 with less zoom). The fact is that all vendors have to adapt to survive in the market. Samsung has no background in optics, yet it sells a very large number of cameras. This is simply because of efforts being put by everyone - that includes Kodak.
The fact is that every vendor has a good model and a bad model out right now. The notion of a camera being good because it's a Canon or bad because it's a Samsung simply has to be thrown out the window. At any price point, one needs to look for the better model. I just found these two Kodaks to offer maximum features and good image quality at this price range.
BTW: Lens does matter. Schneider-Kreuznach, Carl Zeiss and Leica DC are all ancient and well-known names in optics. Most cameras using these lenses are above average at the very least. A lot of Sonys use the Carl Zeiss lens. Ever compared a Carl Zeiss Sony camera with a non-Carl Zeiss Sony camera? It's quite the difference, but only if you look carefully.
To be fair, most Canon, Olympus and Nikkor (Nikon) lenses are also pretty excellent. But, if you have a choice - go for a premium lens, but also look at other features as image processors and the camera specifications also matter just as much in deciding the final image quality.
As for why I said it "kicks" the Sony and Samsung cameras: You will see that the above reviews say that the Kodak has reasonably low noise levels upto ISO 400. This is not the case for most Sony and Samsung cameras in this price range: noise levels remain statistically low only upto ISO 240 or so. This may not be such a big deal but in a cloudy day, one may just notice a big difference in the images produced.