AltBricker's review and off-road test of the Mould King set #18001 Desert Racer is on YouTube at https://youtu.be/S4ahmlO92U0
This is a very basic technic RC vehicle which I enjoyed building. It's a good model to focus on the basics of suspension and the motors. The 4 wheel independent suspension and large soft tires give each wheel a lot of travel. The car moves pretty fast, however be careful not to crash it as it is not very sturdy.
The RC controller works very well. There is also an app, however I was never able to get it to connect reliable from my phone to the car.
I bought mine at https://amzn.to/451ZJl9