I think it is very fun. There is a big learning curve when it comes to handling your vehicle and learning each track so that you don't fail spectacularly and lose a race, but the weapons (some seemingly based off of Mario Kart power up design, there's even a Blue Shell like catch-up item). I also very much enjoy the customization, as there are a lot of decals and paint jobs that can be selected to personalize your vehicle, and there's even unlockable tires and rims. I use a Steam Deck and Proton to play this and it looks and runs beautifully.
I am not rating it 5 stars as the UI has various types of bugs from time to time and some of the tracks, given the realistic physics of the game, have some very intentionally frustrating obstacles that can ruin an entire race. There was also a time where I somehow got stuck outside of the track on another part of the map and while you can respawn at any time back on the track, the way I got there was thanks to the extreme devotion to the physics engine.