One possible version：

I have bought a robot who looks as if he were a real person.

I'm glad that he can do many things for us. He can do housework, make meals, help my son with his homework and even accompany me to the shop. In a word, he brings much convenience to our life. But at the same time, there are also some points which I feel worried about. I wonder whether he will obey our orders if there is something wrong with him. And what I should do if my son has the robot do homework for him. Besides, I'm also afraid whether the robot will hurt my son if my son makes him angry.

I think with the development of technology, scientists will improve robots greatly. There is no doubt that robots will help us a lot and be widely used in more and more areas.