It’s an online auto racing sim. I just started last week, but I’ve been impressed so far. Initial observations:
Real racing punishes stupidity through financial and Darwinian disincentives. None of that applies online, but they still want clean racing. (One leadfooted asshole could ruin the fun for a lot of people.) There’s a licensing system that rewards (virtual) safety. Also, everything is done under your real name, no nicks.
Beyond the initial cars and tracks, you have to pay for content. I’m not sure how that will shake out yet; lure you in with cheap subscriptions and make it up on tracks and cars, maybe. The detail and accuracy are very impressive.
It’s susceptible to network issues. Other cars wink in and out, occasionally, and I’ve had lost my connection a few times. (I think that’s a local problem, though.)
There are some heavy hitters on here, like Dale Earnhardt Jr. And even the people you’ve never heard of are wicked fast. So far, I’m mostly trying to stay out of the way. (Had some decent finishes when others have gotten too aggressive.) It tries to match you with racers of similar skill levels.