I bought a set of 185/65-15s right before Thanksgiving and now have about 5500 miles on them. Very satisfied so far. They have better grip than the Continentals my Rio came with, and are not noticeably noisier. There was a little bit of a hum on wet pavement during the first few hundred miles, but after the first rotation I no longer hear it. We just came out of an ice storm and they even did OK on the ice, as long as I wasn't too adventurous.
I hadn't bought tires at Walmart in several years, but if these keep on as they have been, I'll definitely buy another set when the time comes.