Summary: Long story short I have had a DP2 for about four years now. A week ago died and decided to fork $1k for the Merrill version. Great camera but the contrast was way too strong for my taste. I really couldn't stand that camera and retuned it to Adorama after only two days. Decided to buy a DP2X but Amazon Warehouse just listed a DP2S in like new condition for $300. Took the chance (though I was looking for the X version) and ordered it. I love it.
Summary: I love this small camera. I especially like that you can take 3 shots at different exposures and the convert to HDR. Just don't buy the external viewfinder. You can see thru it just fine, but it doesn't show focus so you have to look at the screen anyway if you are trying to manual focus. The photos that happen with this camera are wonderful.
Summary: Others have given very good reviews of this camera, both positive and negative. What hasn't been said is that with this camera you'll feel like a fool. Although it looks very neat, to the uninformed it will look like some $50 P&S. To a photographer it will look like a joke next to their bejeweled D3x or 1D, 5D Mark II, etc. I too, love my Canons and believe they should beat this little no-name camera out of the water. But they don't. I've been trying for 2 years.
Summary: I will skip all the technical points, etc...this is a beauty...not a toy...simplicity encapsulated in one small package..I bought this with a dose of skepticism, after considering DSLR'S, just on the concept of the sensor itself, thinking it might not live up to expectations and that I could return it and buy that DSLR. No way. This small package is an incredible piece of engineering...the color is amazing..
Summary: This review is written after several months and thousands of photos with the Sigma DP2s in a wide variety of scenes. Images created by this camera, when the focus is correct and light is sufficient, are very hard to find flaws in. Every hair or grass blade can be sharp and distinct. The separated red, green, and blue channels are equally sharp, unlike any other single-chip camera. It's a revelation, and it simply ruins all other compact digital cameras in comparison.
Summary: Having owned and used the Ricoh GRD 3 and the Leica D-Lux 4, I must say that the Sigma DP2s just shatters what I held high of those two cameras. They are both sensational cameras that are a joy to use and to bring along during your travels. But the SIGMA has out done them, not in terms of design, size or UI friendliness, NO both the GRD 3 & D-LUX4 are strong in those departments, stronger in fact than the DP2s.
Summary: The Sigma DP2s is unique. I cannot say it is a point & shoot, but it is not a DSLR either. It is somewhere in the middle. Do not buy this camera if you want a convenient camera to pop a few quick shots of anything. It is better for a photo that takes time. The DP2s is for a person who hunts for that spectacular image & demands extraordinary image quality. I have not seen images this great since my last film camera broke in 2004 & I went digital.
Summary: I read so many reviews complaining about this camera that I almost didn't purchase it. I had traded in my entry level DSLR in search of a compact that could give decent image quality and bought one of the more expensive point and shoots. It had all of the bells and whistles and took decent pictures -- but nothing great. So I returned it and took the plunge on purchasing the DP2S -- mostly because of the quality of the images that I saw from other users online.
Summary: I was previously a user of the Sigma DP1, and sold it a few months back. Since then, I have tried a Rivoh GRD III, Olympus E-P2, and Panasonic TS2. None of them came close to the image quality of the Foveon sensor in the DP2s. The build quality is also stellar - feels solid in your hand, even if just a bit 'slick'. I'm also glad to see that Sigma has added an interval timer and quick settings button for rapid changing of settings.
Summary: *August 2010: (from time i purchased)I am not going to explain the details as above users have explained more than enough. i tested out indoors and outdoor shots, and despite all of what it can not dos, the image quality is amazing, and this little thing will embarrass some of big bulky and more expensive DSLRs. SigmaDP2s is slow, Point and shoot is not easy, but more like think and compose then press the shutter with confidence.