Instruct: Classify the given review into positive or negative sentiment.
Query: Marginally Functional / Barely Useable

I bought one of these natural gas heaters mainly because it has electronic features including a timer as well as a fan built-in. At first it worked well but less than 6 months later the digital thermostat barely works which means the temp will drop as much as 6 degrees from the set temp before the heat goes on then over shoot several degrees before shutting off. The difference in comfort between 65 degrees and 59 degrees is huge! The built-in fan, which is meant to come on a minute or two after the heat comes on, now usually comes on after the heat turns off. The electronic pilot light is a nice feature however the pilot shuts off randomly and once the pilot is off there's no heat until it is restarted manually by pushing the ignition button. I use this heater to supplement my central heat and am in an area that doesn't get super cold. If I depended on this heater as my primary heat it would be completely useless and I would have rated it 1 star.