Very heavy, not too terrible to put together. Ive done worse. Instructions were very easy to follow, for me as a dyslexic person, thats saying a lot. He was in love, he is 43 inches tall and 5 years old, he looks like he will enjoy it for at least 2 more years at the rate he grows 2-3 inches a year. I got him a 4 wheel also but he wanted this one to play with. He got on about 2, and it still had a battery at 520. That was right out of the box. No  extra charge. It jack knife when backing up, but that is because of the new driver. He was starting to figure it out why though. By next time he probably will have mastered it. He likes the hauling it can do. He was picking up and moving all kinds of stuff. At this moment, I would give it 5 stars for assembling, 5 stars for sturdiness, and he would give it 2 thumbs up for likability. He loves it!