Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buyer beware

The monitor was beautiful, with excellent resolution, but I had to send it back. I got sound, but no picture when trying to play a DVD or run a video on Windows Media. The instructions manual that came with the Acer monitor was pathetic - no help at all. Online tech help, which responded only after I waited ONE WEEK told me to contact the manufacturer of my laptop. There was no customer service number in the instructions manual. I'd think twice about purchasing from Acer if were you.