COG: "Overall, the three classes seem nicely balanced. I was worried about the cloaking ability and players exploiting the function online but Ubisoft did a great job implementing it. The UAVs are not as annoying as BF3 mainly because they only require a round or two from an assault rifle to take down. Sensor grenades only show enemies within their proximity and the screen will tell you if you are being detected. The ability to stun an enemy and hack them for intelligence is also really interesting and well thought out. This is a risky yet rewarding method as it gives you information on the entire enemy team not just an area of the map."
At first I had problem too, but now it works almost always well.