Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One of two leaked.

I admit that I purchased two of these units from Lowes last year on a close-out sale for only $29.99 each. But when one of the units started leaking oil after two months of use, the shipping cost to have it replaced or repaired by DeLonghi was $16.00 more than I had paid for the unit.So, I mixed up an epoxy compound, about $4.00 worth, and plugged the leak myself. It has not leaked since, but both of my Chinese manufactured units are of much lessor quality, and only have about 60% to 70% of the heating capability, when brand new, as my ten year old Canadian made unit that I bought at Home Depot for a full price of $39.95.Both units, after only a total of about five months of light use are starting to fail when used to try warm up a small area of around 50 square feet.