The first thing I tested was the 61 points focusing system. Some said it is not any better than 7D 19 points focusing system, I would say that they are wrong! I own a 7D, and I did side by side test, 5D Mark III is certainly better and faster than 7D.
Easy To Use; Fast / Accurate Auto-Focus; Fast Shutter Speed; Good Image Quality; High ISO Performance; Large Clear LCD; Quiet; Strong build
No Build-in Flash Trigger; Poor focus in low light