Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be careful! Unixmacdotcom is is dishonest.

I bought the printer, but it is out of work.The IR indicator ligh is off when the printer is ready, which indicate the IR receiver is out of work. The printer can't connect with my laptop because no data line was included in the package.I tried to contact the seller, but no one gave me an answer.The seller is dishonest. They claimed the printer is very good, but the printer can not be use properly.The seller is irresponsible. I tried to contact them, but none of them replied.