Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Terrible sound quality, but an excellent performance

Be warned; the sound quality is absolutely horrible. It was recorded in a Nashville bar, and I'm pretty sure they dragged a drunk in from the alley to run the sound equipment. It's muted, thumpy, washed-out and unclear. Coupled with "Pearl's" (Buster's Godin guitar) nasally piezo flatulance, he might as well have been playing bongos.It's heartbreaking. I knew Buster well, and he HATED this tape/DVD (it was originally issued on VHS video). He was always his own worst critic, though, but I really enjoyed the performances. The best parts are the three duets with Thom Bresh, which are some of the very best guitar playing ever captured on film.