My PTP has us doing this just before 10am. Is it open all day? For some reason I thought it was only in the evening.
Yes, it opens when the park opens. I was reading somewhere last night (maybe chat?) that it's gotten much more popular lately and that early morning is best.
I read that the first class is a 1/2 hour after park opening. My TP has it starting at 9:30am. Classes are on the 1/2 hour, and you may have to wait through 1 class to get in. Popularity is definitely increasing. We're hoping a morning class will work, too.