Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Id think again

Bought this item 18 months ago and have had no problems. Started having issues, spent 10 bucks to send it back, they sent the same one back saying it works fine and I have other problems with my amperage. Had purchased another brand controller and setup seems to be working flawlessly again!!! The units work great when operating right but their customer service has the last word.