Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No clue whatsoever. Whats a UMD??

I ordered this from DEAL-DUDE and thought it was a DVD but its isnt. It goes in some kind of game console platform or whatever so I could not use it. Nice of them to tell me, eh?I returned it to DEAL-DUDE for a refund a long time ago but that never came, and my frequent requests for store credit to exchange for something else have gone ignored. But hey, DEAL-DUDE got their product back! [and kept my money].I dont recommend the product nor the vendor. You'll lose on both ends.