We just watched that. The sound of the booth is similar to those old Folkways field recordings of hillbillies and Africans. I used to listen to those, and after about 15 minutes the sound makes you want to jump off a ledge. Carol wants to hear the record, so I suppose we'll buy it (though not that giant sucker's deluxe box they are hawking for $100).
If you're in Nashville you can record in the booth for $15 (+$3 for a sleeve with postage on it). Seems like a bargain for an experience most of us never had, and never could have before this.