Kind of confusing to me. Because personally I have thought the concept of imitating dogs and humans walking, is a potential weak point in robot design. But this? I fail to see it's practicality. It seems, better at, going directly left when it was going forward? The fact that the whole design rolls to move makes it fairly, impractical for any tasks involving moving things or using anything. It can travel on sand, though I'd imagine stairs or even too high of a hill would be implausible.