All my family and guests loved them! I didn't use the m&m's though - I doubled the white chocolate chips instead. The dough was very thick and difficult to work with. I ended up adding about 2 tbsp water and still had to knead the dough to get everything well mixed. Be careful for burning! like the recipe says the chips absolutely turn brown especially the ones that touch the pan. I had to lower my cooking time to 7 1/2 mins to prevent scorching...but I didn't use the parchment paper as the recipe calls for so that may be the reason why. The next time I make them I'll use the paper to see if it really makes a difference.