I catch it on Speed every so often. Doesn't seem to be any consistency to when races are shown though.
The cars are decent. They have a Champ Car-esque push to pass button that doesn't seem to net much overtaking in my experience. Sadly the US team rarely runs in the top 10 so that may spoil it for some. IMO the best part about the series is the liveries are what you'd expect them to be. The Dutch drive bright orange, NZ sports their "all black" and so on. I'm fairly certain Speed has aired both seasons, though many races show out of season as is typical of anything not NASCAR.