I'd give it five stars if it weren't for the disgusting bathrooms.
In any case, I've never been to the annual Twelve Hours of Sebring endurance race which the track is known for. I have been numerous times for HPDE (high performance drivers education) and club racing events and have driven thousands of laps on the track.
For those not familiar with HPDE and club racing, it's basically private clubs that rent the track out for a given weekend, then let their members drive on it, or race on it. Some clubs are strictly HPDE, where you're broken out into groups of typically novice, 'solo' where you're experienced enough to drive without an instructor, and then some type of advanced level where the passing rules are less restrictive. These HPDE events are absolutely perfect for anyone interested in fast cars and auto racing to experience any given track for a small amount of money. For example, one group that does events at Sebring many times per year is called Chin Motorsports. They will you register as a passenger and sign an injury waiver (in case you die lol) for a small fee of $20, and then for the rest of that day, you can ride with any solo qualified driver as their passenger; you just need closed toe shoes and a proper helmet, which you can even rent from them if needed. Many drivers are more than happy to have someone riding along with them.
Two clubs popular for racing events, if you want to watch some multi-class racing, are PBOC and NASA. These obviously aren't F1 cars, but there are some reasonably fast cars that show up even for the club events, so don't overlook it. You can also typically get in free as the track doesn't charge entry fees at these events. read more