For me this robo was good. It's design is such that it has little balancing problem, but not too much. once carefully placed on surface, then start, it works fine. My kid loves it. It's been few months now and still works fine. Just 1 problem, its sound bit loud for small kids to play around it. I had to cover it's speaker to suppress sound.
Though my child finds it interesting to see the revolving lights and robot but the quality of plastic is very poor. One drop and a foot of the robot was gone. Toddlers' toys ought to be more durable than that. It is expected to survive atleast a few falls.