Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unbelievable

I purchased this product hoping it would resolve my low humidity in my office. I filled the tank at 6AM this morning before starting work from my home office. At that point in time the humidity in my office was 22%. I checked the humidity at 5PM and it had gone up to 27% and used 95% of the water. I then put a call into the Hunter Service and support to find out how long it should take in a 300 foot office for the humidity to reach 45%. I was amazed when I was told that it would take 2 to 3 weeks to get the humidity to 45%. It goes back tomorrow.