For the cost of this camera, I don't think you can get anything better. The low light performance is off the charts. As a wedding photographer I regularly shoot with Nikon's high end professional equipment and I was amazed how close this camera is to a pro camera. Now let me get specific. In order to compare I took a look at 100% files out of each camera I own.

Which camera excels Nikon D3100($Cheap) VS. D300($1600) VS. D700 ($2,700):
* Lens = The D3100 is the only camera that comes with a lens at it's normal price
* ISO Performance = Tie between D3100 and D700! (It could be Nikon's new processing but the JPEG looks fantastic I was shooting D3100 on 6400iso with very little noise at all)
* Low Light Focusing = D700
* Focus Speed = D700
* External Buttons & Controls for Pros = D700
* Menu Navigation = D3100
* Ease of Use = D3100
* Megapixel = D3100 (14.2)
* Sensor size = D700 (Much more important than megapixels but I won't get... Read more

I recently updated my DSLR collection to the Nikon D3100 from the Nikon D70. There are good reviews out there that you should check out. However, I would like to share some of my first impressions.

Pro:
-Better image quality and lower noise at high ISO with the D3100
-MUCH MUCH lighter, which will be nice when traveling
-Larger LCD screen
-11 focus points, including 3D focus which tracks the motion of the subject or camera.
-1080p Video
-14 megapixels
-2nd Generation DSLR
-Quiet, quiet, quiet

Cons:
-No bracketing option. Not a huge deal since I only bracket once a year
-Cannot use my old 50mm 1.8 lens. I knew this before purchasing the camera.
-As of 10/1/2010, Camera RAW for the D3100 is not supported in Photoshop or Lightroom. Need to shoot .jpg + RAW or use Nikon Capture NX2 for RAW files. That should be updated soon, so not a big deal.
-Can hear the lens focusing when recording video.
-No depth... Read more

This Nikon D3100 is a phenomenal deal for non professionals, the rest of us people that want to take family and travel shots. I've owned DSLRs since 2004, starting with a Nikon D70 and then moving to D40, D200 and Canon Digital Rebel XSi 12.2 MP Digital SLR Camera with EF-S 18-55mm f/3.5-5.6 IS Lens (Black) and Canon EOS 40D 10.1MP Digital SLR Camera (Body Only). Those are all excellent cameras, but this Nikon D3100 is better than all of those in one crucial area, the area that matters: it takes excellent pictures without having to fiddle with the settings between shots. Yes, the other cameras are better in other respects: They have more buttons to change settings without delving into... Read more