I don't know if you're looking at it from the point of deciding whether to go, or whether to apply. This year's apps are closed.
Expect quality of Aspen, MAW, Verbier type experience and ability.
A lot of overview is detailed here
http://www.festivalhill.org/index.ph...age&PAGE_id=52
It's a long standing full scholarship festival. It's geared towards college age conservatory level students, grad, prepros and emerging pros. The audition pages lists last year's off-site live audition venues. From the list, the auditions are centered at the hotbeds of high level instruction.
Assume competition from Juilliard, NEC, Eastman, Oberlin, Rice, SF Conservatory and other high quality programs as well as those from other schools.
Faculty is listed, drawn from Dallas, Houston and other major symphonies, as well as distinguished instructional professionals.
I can't specifically address chamber or performance opportunity but the overview will give you an idea. My son did not have personal experience there.