We've had frost free combos for a long time with very few problems. However there are two down sides that one should consider. First, the way the "frost free" device works requires an actual heating coil or lamps. This uses quite a lot of energy and if you compare the cost of operation of a fridge without frost free vs. one with, you'd be surprised at the savings without it. Secondly. again, related to the way the frost free option works, is the fact that a sensor allows the heat producing element to heat the freezer side to about 32 degrees F before shuting it off and allowing the freezer to resume cooling at about 25 to 28 degrees F. During this heating period, the food stored also begins to reach 32 degrees F. This is one of the major causes of "freezer burn" and can contribute to a shorter acceptable life of frozen foods. Lastly (I know I said two), most people don't clean and empty the tray under the fridge into which the thawed frost from the freezer drains. It then sits under the fridge in a warm dark environment perfect for the growth of nasty smelling mold and fungus. This is usually the cause of folks complaining about terrible smells coming from their refrigerators. I still think they are more convenient that fridges without the feature, but that's our choice... others may willingly accept the interminable defrosting required of units not so equipped...