google it. the biggest thing with cmos is the rolling shutter effect. The benefit of a CMOS is that they are cheaper. Some of the higher end cameras by sony or panasonic with CMOS chips deal with the rolling shutter better than the others.
I shoot mostly documentaries where I show up in many different indoor environments and have to shoot with mostly available lighting. I have a CMOS and a CCD camera and on almost every job with the CMOS camera at least one room or wall or something is creating a strobing bar effect-- rolling shutter-- due to a particular combination of florescent bulbs and frequencies and whatever.
So if you are run and gun at real-world locations, be aware. It's not always pretty.