Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: not a good one to buy

i purchased this thermostat and have had many issues with my air conditioning. i had to call a technician and spend my money to help troubleshoot the manufacturing defects in the unit that was shipped. i have to give credit to amazon customer service, they shipped me a replacement unit asap. but the issue is now my air conditioning will not shut off. the compressor runs all day long even after the temp has been achieved. i think honeywell goofed up on this unit. i had to go back to my non-programmable unit just to keep the house cool/warm without blowing up my hvac system.