Good hot lapper with a pretty good recreation of spa-francorchamps. Personally I like the "sim" feeling of having to warm your tires and manage your energy - but that might not be for everyone. Speaking of energy management, it's probably too punishing. It's impossibe to recharge to 100 after you've depleted the battery. Good sound design as well.
Edit: they've added ERS management modes so you can now charge the battery during cooldown laps. Thanks dev! Now we need pit stop refueling for longer lapping sessions :)