Let me start out by saying I love breakfast sandwiches! I've used this gadget with English muffins, sandwich thins, and croissant thus far. The English muffins work best. Sandwich thins are too dry and tend to burn. The croissants get a lovely crisp outside if you used enough cooking spray otherwise also burn. If you put the top on I got a runny egg which my husband loved. Since I like a firmer egg and did not want to burn the top of my croissant I left the top off for 3 min then added it which worked fine. My daughter did not like the crisp on the outside of the croissant so the next thing I will try is putting the egg in till it sets around 3 min and then lifting up and inserting the croissant and cheese on the bottom and adding the croissant to the top for the remaining 1.5min just to warm it.