Festivals for the most part hold the best soundchecks. This is typically because they are very "Jam Heavy". Even festivals like Festival 8 had some great jams during the soundcheck and they did not really jam at all that whole weekend.

Although this soundcheck is not on par with some other festivals and shows. I still think the 20min jam at the end is a fine jam. It captures the beauty of the Ambient and then turns quickly into mayhem towards the end.