After trying it, I agree with Dustin that the booking system is flawed. But, I guess some MP is better than none. I felt the netcode was quite poor, I got hit on the grid and flew a million feet in the air and got no damage. I understand it's beta, and quite good for a beta. Was surprised by how well it went to be honest. I thought I would be getting dropped from the game like crazy.
One shame I see is no real way to implement driver swaps :/