Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Great until 6months after i bought it.

Features are EXCELLENT!.. However customer service DOES NOT EXIST!!.. The display went out on my 6 months after i bought.. sent it off to denon.. Took 6 months to get it back.. I called multiple times and could not get an answer.. Went onto the website and filled out the "customer service card" and still no service.. I finally got a body and they said "your unit is in service we will ship it out in a month".. WTF.. It came the next day.. Interesting.. Bottom Line.. Customer Service for Denon does not exist. If you have any problems your SOL.. I sole mine on ebay.. DONT BUY IT!.. I paid $700.. And felt betrayed.. No more denon for me.. If you want a DVD Player get a apex ($80) bucks from walmart.. It'll play everything including burned CD/DVD.. This unit will not..