I've been in iRacing for 3 years. I love it. It's by far the most legit if you're a serious sim racer. They take cheating seriously and ban people, and you can file protests. Plus if you are really fast you can compete in pro series for cash and prizes. Many iRacers are real world drivers or started in sim racing and now drive in real world.
The downside is cost. It's membership, as you're paying for the whole online racing setup and service. You have to buy cars and tracks as well. But it's worth it, no dance required or crazy mod downloads. It's all automatic via their website.
Right now they have a deal 3 months for 12 bucks go for it! Use my name as a referral Matt Berndt if you give it a try. The default cars are a lot of fun
