I purchased this camera a couole weeks ago along with a 50-200MM zoom.
The camera feels great ( i have large hands), is easy to use, and the menu system works well.
Pictures in automatic (smart) mode are sharp, although in lower light conditions it will tend to lower the shutter speed before increasing iso.
Be sure to update the latest firmware available from samsung website.
Some settings in menu are only available for particular shooting conditions, for example if you want to put it in raw mode, then be sure to set the dial to Apature first. In a way this makes sense because raw is only available when not using the smart mode, such as apature priority, but it can be an intial stumbling block when first setting the camera up - once you understand this premise then the rest is very smooth sailing.
I have not tried video yet, however from what i have read, like many cameras with video built in, the quality is excelent when camera movement is not needed, but falls apart for action shots in the artifacts introduced. Also there is no external microphone jack so sound quality will be sub-par. If video is important, then the panasonic G series would be a better choice, but better yet would be a dedicated video camera.
The senseor is 50% large in size than the panasonic g-series with 20% additional pixels. What that means is that there is 30% more area of the on each pixel for bringing in light, and thus more headroom for improvement. I am sure over the months Samsung will tweak their alogrithms to take better advantage of this.
On time is excelent, as well as processing time; of course raw is going to take a bit longer.
Be sure to get yourself a good quality card for the camera.
I can carry the camera with the 18 -55 kit lens and the 50-200 zoom (300mm film equivilant) in a zeikos bag with only a 9 inch main compartment -that is the reason for getting a camera like this. It is not a studio replacement, but not intendended to be - for everything else it is fun and far better than a point and shoot if you know how to use it.