Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I like the product ... till it simply stopped working.

I bought this product in July, and have been using it to make breakfast smoothies with some protein power, berries, yoghurt, a little crushed ice -- nothing that should challenge a decent blender. After 6 months, it simply stopped working, the blender is dead. I notified Back to Basics customer service. Should be simple, right? There's a 1-year warranty, so send me a new one! Nope, not yet at least. For two weeks we've been going back and forth, they keep asking for more information about what I put in my smoothies, as if it's my fault their product sucks. If they had simply sent me return shipping and gotten me a replacement immediately, I would've said this is a 4-star product and I had bad luck. However, after dealing with this company I would strongly advise against buying this product -- or any product from Back to Basics, if this is how they treat their customers.