Instruct: Classify a review into positive or negative sentiment.
Query: Not if you want them to last

I took a long time looking for the best headphones in the under $100 price range. While, the SD 497 met all my expectations the first 4-6 months or so, the quality started to deteriate after 6 months. I have finally lost the right channel, which Sennheiser said they would look at for $90 and fix. Hey! I only paid for $75 originally for the headphones. Duh! Is this the "no brainer". I'm going to my second choice, Sony. No more Sennheiser's for me again.