My barn holds it every summer.
I placed fourth out of nine, but what's most awesome about my ride was that my horse is such a struggle to get on the bit. It seriously takes hours of riding to achieve it if that at all, he's making pprogress, but slowly.
As soon as I got into the ring his head went down. I was stunned :O
Here's our ride, I know some of our circles weren't perfect, that my stretch trot circle was supposed to be rising (got marked down for that) and that my horse lacked impulsion, that was my major down point.
But, we placed well for our errors.