I bought it as an upgrade for my daughter's old and broken one. I searched for it on YouTube and other videos before choosing it. We have had it for almost two weeks and it has taken dozens of tumbles. It has been dropped down stairs, knocking into furniture. Yesterday, I saw it do 2-3 rolls in dirt and gravel, and the dog just spun around and kept going. The truth is, with the reviews I have read, I am very afraid, but for now, it has held up. It has two rechargeable batteries (USB) that last about 20 minutes each and charge fairly quickly (according to the manual, 2 hours). The remote control requires 3 AA batteries. In the first tumbles it took, it lost 2 of the pins that hold the chassis in place, but it has spare parts and if you put them in all the way, they don't come out easily (the child may need help putting them in and taking them out). Being four-wheel drive, it doesn't get stuck easily, it has climbed slopes with over 30 degrees of incline and dirt, it can ride over stones bigger than its tires if it hits them properly. It is fast and "nervous," so it's not suitable for indoor use because it will knock over furniture. It performs well in the park. It has a protective membrane on the chassis that has become wrinkled after two weeks, but it's a minor issue. In a strong collision with a tree trunk that hit the front wheel, the wheel base detached from the transmission axle, but by simply turning the wheel by hand, it snapped back into place and back to glory. Overall, I don't know if I was lucky and didn't get a defective one, but I am very satisfied. I still fear it whenever she holds it in her hands to pilot it and tear it apart, but she herself is very satisfied so far.