"This was a challenging and fun build. I worked on it a couple hours each night 2 weeks. The separate gear boxes for the upper and lower portions were a nice twist. It is a very fun model to play with. All the power functions run smoothly with the only exception being with the boom all away extended there is some jerking in the right and left rotation but it is minimal. The hook on this crane is sturdier compared to the crawler Crane grappler, although I think they still lift a similar load."