I am in the process of installing new floor in my house. I have been told by a friend that porcelain tile is a lot harder and more durable than ceramic tile and therefore better. Another friend told me just the opposite, porcelain chips and breaks more easily than regular ceramic tile. Also, I have been told to keep an eye on quality, but how do I know if a ceramic or porcelain tile is of good quality. Everyone keeps on recommending a specific store, they are also one of the most expensive ones and I can not believe they are the only ones that are selling a quality product. When buying the floor, what questions should I be asking the sales person to find out?