Pros: very good quality photos, excellent 5-axis image stabilization, electronic viewfinder, today one of the best, very fast autofocus, a swivel touch screen, color reproduction is excellent, performance, 10 fps, huge and the best in bettercare buffer 50 RAW frames, the build quality and material at a high level, it is also waterproof, a huge selection of optics, support through a different lens adapter 4/3 system ( 35-100mm f/2.0, 150mm f/2.0 ), Wi-Fi, HDR, a lot of different artistic effects built into the camera and also there is a control function via USB through a computer.
Disadvantages: the price is not small, do not like the memory compartment and not very comfortable grip. But for the functionality it cannot even be attributed to shortcomings.
To summarize: I can say that the Olympus OM-D E-M1 is the best at the moment bezzerkalka in its class. Photo quality is excellent, speed and ergonomics are just on top. Bought just over 1 year ago - I was very happy with it, and it has everything I wanted at the time. Turned out to be the perfect camera. Compared with others, but still chose this. Because it outperforms other brands. And only OLYMPUS is much more pleasant to hold in hand. Understand the functions quickly and easily. In General, I believe that I chose the best camera to date! And all I can advise her to take and not to think. During the operation problems, damage was not. This camera is suitable for both beginner and experienced photographer.