Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DO NOT BUY

I have used PUR filters since they first came out - a LONG time. At that time, they were the best bang for the buck, easy to use, good filtration, and cheap. Various leaks and issues would develop over time (some lasted longer than others), but the company *always* stood behind the product and would replace via the mail (then they started issuing vouchers only, which I typically lose before using).But with this new one - filters do not last as long as the old model; the on/off lever is TOO easy to turn - you are not supposed to run hot water through the thing (company says the filter should be replaced if so) - but it is impossible to prevent - we are constantly flipping the lever by accident - it is a real pain.And most importantly - I contacted the company several times - NO RESPONSE. I will not buy another.This is not the same product or company - they no longer "deliver."