Q. I have heard that in kaliyuga mentally if someone does any sin it will not give any reaction.Also in this yuga, auspicious activities produce result immediately. What are the special advantages of law of karma in this yuga?

A. The special advantage is just by chanting the holy names especially Hare Krsna Mahamantra by  the mercy of Lord Caitanya any one, even the most sinful will go back to the spiritual world and achieve love of godhead.

This is the only special advantage. All other so called points are illusory and fruitive in nature. What you think today you will do tommorrow. So if you are not punished for your thoughts, you will be punished for action as we are going to do what we think.