Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't purchase unless you use it on a computer

I am soooo disappointed. I heard this was the best DVD on Crosby, Stills, & Nash.I am unable to play this DVD on any DVD player I have. I have a sony, zenith,and a panasonic. The only place it will play is on the computer. The DVDs do not recognize the region it is from. On the computer I was able to click on a region outside of the USA and it worked. It is not a lot of fun watching a concert on a computer. I wish there was something I could do like return it but I didn't play it until I had time a month or so after purchase.