Good price, right size for our maybe slightly smaller than average 6 year old on one of the middle extension settings. Light and so easy enough for him to move while he can't put weight on his broken leg. More stable than crutches. We didn't need four wheels as it's a hop he has to do, not continuous walking, so the two wheels are great as he doesn't have to pick up the whole thing to move it, but can lift and slide it forward before dropping it down to be stable to hop forward. Colour makes everyone smile!