Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Look cool- but functionall Crappy- Poor battery Life

I wanted so bad to like this company. Seemingly cool looking products. I like design, and Vessels products have the aesthetic I'm after. I bought the 4-set of Candelas in the Moma store in NYC, after charging them for 24 hours, 2 of the 4 did not work for longer than 3 minutes. I returned them to the store. 3 weeks later, 2 of the new Candelas started diminishing 10x faster than the other 2. I then contacted Vessel, who was surprisingly unfriendly and not very helpful. After a vigorous letter, I received 2 replacement Candelas (i marked them on the bottom) which lasted- get this- 2 weeks before fading out after 10 minutes. I sent the whole thing back to Vessel - who told me without the original receipt, could not refund me. I promptly told them to keep them. Terrible business practices, and useless product. How can a company like this stay in business>?