I have no problem with aggregators in real estate. They can serve a positive purpose in the business. I do have a problem with Zillow and its errors. I have a problem not mentioned by others. The Zillow map is inaccurate. My town's map doesn't include about 1/3 of the town. We've complained to Zillow and their response has been to admit their map is wrong but they won't fix it for another four months. When people use the site they never have a chance to see properties in the omitted section of town. If Zillow was seriously responsible, they would correct the map now. Every real estate professional in town knows that sellers are being damaged by Zillow with their faulty Zestimates but not everyone knows sellers are being damaged by the map problem. It is pure arrogance on Zillow's part to admit they have a problem with their map but refuse to fix it for several months.