We’ve owned this fire pit for 2 years, it’s been thru 2 ‘mild’ Chicago winters.  After the first year there were small cracks on the top and i reasonably filled them in with the colored pen provided to remove the unsightly weathering in the surface.  This year when we uncovered it, the edge has a 3” large chunk cracked off and the surface is significantly disfigured.  It’s not fixable.  We keep the pit covered all year long when not in use and care for it appropriately.  This is a disappointing defect in the quality of the concrete that can not withstand rain and cold.  Unit does not last, nor meet a consumers expectations of quality construction.  Disappointed I’ll have to buy a new one so soon.  Waste of money.