The brand Kent has been cheapened by Walmart and their cost cutting so much that I wouldn't take one for free. The big box store Kent's sell under several brand names, all heavy and cheap bikes with poor life expectancy.
Unfortunately, I am old enough to remember when Kent was a decent mediocre brand worth considering for the enthusiast occasional cyclist. That isn't the case anymore unfortunately. The same for Schwinn and a few other once popular name brands for the average Joe.