After being nearly killed by bad updates and setups from iRacing. They finally got it right with the Radical SR10 this summer. Now it provides great racing far into the duration. If you are on iRacing, get on that car. The busiest timeslots are around the European evenings.
The SR10 is heaps of fun if you accept that it is not a direct replacement of the SR8, which I drove for a bit before they brought in the 10. I see it as a modern, downscaled take on the big-turbo era of prototype racecars. My main tip is to take care on the throttle on cold tires in first-second gear as the turbo really kicks in hard.