Upon the first use, cooking fried eggs, the food stuck to the pan, leaving a residue. Tried to clean the pan as per instructions, with a vinegar solution and also with baking soda . Neither worked. Next I cooked pancakes, this time using a bit of olive oil applied with a paper towel. The pancakes completely stuck to the pan; it was a mess. I gave up and used olive oil spray. I know one is not supposed to do this, since it interferes with the nonstick properties of the pan. But the pan hasn't been nonstick from the start. So now I have a pan that is both not nonstick and also has permanent burn marks on it. 
Purchased this product based on the good reviews I read, but my experience with it has not been a good one. I am sadly disappointed.