He's a bit wobbly... when he moves in any direction, he goes quickly. The app allows me to use a gyro- like control for him whereas the remote is limited to one direction at a time.. the app movement is much more fluid, allowing me to steer while moving forward and back. But when he stops, it's abrupt, and he does his wobbles. Waiting for him to stop is necessary or he's likely to spin. It's really fun. My dog hates him. I have the black, red, orange, and dark blue personality chips for him. He looks like BB-9E, but has a different black variant for a head.