Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: porly made

the silicone mat 24x36 had a very poor finish on the surface,which is supposed to be smoothed for rolling fondant on. it was pitted and bumpy i was offered a refund or exchange but the cost to send back was to much. i live in the UK so i would advise to people to think before they by from the USA because the cost to send things back to the USA are outrages