Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: great oil diffuser

This is a great oil diffuser. It looks nice and diffuses the oil very well. The only downside is that the tea light lasts much longer than the liquid at the top therefore you need to keep an eye on it and either replace the water/essential oil or blow out the candle. Other than that, I am very pleased with this product. The item was shipped before the initial expected date. I would purchase a similar item again from this seller.